diff --git a/core/composer.json b/core/composer.json
index 71f07d029fdc3c63c2e12ac29cc5a0264fe58c95..8f69344b650bb39a475735476ae8b29a8307fe4c 100644
--- a/core/composer.json
+++ b/core/composer.json
@@ -109,6 +109,7 @@
         "drupal/link": "self.version",
         "drupal/locale": "self.version",
         "drupal/minimal": "self.version",
+        "drupal/media": "self.version",
         "drupal/menu_link_content": "self.version",
         "drupal/menu_ui": "self.version",
         "drupal/migrate": "self.version",
diff --git a/core/modules/media/config/install/media.settings.yml b/core/modules/media/config/install/media.settings.yml
new file mode 100644
index 0000000000000000000000000000000000000000..85f1c811d37abb3e309d9bb1dafc68bfe81a3d9b
--- /dev/null
+++ b/core/modules/media/config/install/media.settings.yml
@@ -0,0 +1 @@
+icon_base: 'public://media-icons/generic'
diff --git a/core/modules/media/config/optional/system.action.media_delete_action.yml b/core/modules/media/config/optional/system.action.media_delete_action.yml
new file mode 100644
index 0000000000000000000000000000000000000000..62af35ea5df19897e3921bd7c1c48969d7de9aea
--- /dev/null
+++ b/core/modules/media/config/optional/system.action.media_delete_action.yml
@@ -0,0 +1,10 @@
+langcode: en
+status: true
+dependencies:
+  module:
+    - media
+id: media_delete_action
+label: 'Delete media'
+type: media
+plugin: media_delete_action
+configuration: {  }
diff --git a/core/modules/media/config/optional/system.action.media_publish_action.yml b/core/modules/media/config/optional/system.action.media_publish_action.yml
new file mode 100644
index 0000000000000000000000000000000000000000..95e173d6f764d6e467ae630f5390f4b5175563b3
--- /dev/null
+++ b/core/modules/media/config/optional/system.action.media_publish_action.yml
@@ -0,0 +1,10 @@
+langcode: en
+status: true
+dependencies:
+  module:
+    - media
+id: media_publish_action
+label: 'Publish media'
+type: media
+plugin: media_publish_action
+configuration: {  }
diff --git a/core/modules/media/config/optional/system.action.media_save_action.yml b/core/modules/media/config/optional/system.action.media_save_action.yml
new file mode 100644
index 0000000000000000000000000000000000000000..c4d098f4bc43cac8a9f68a87e4eeb557bc2468c5
--- /dev/null
+++ b/core/modules/media/config/optional/system.action.media_save_action.yml
@@ -0,0 +1,10 @@
+langcode: en
+status: true
+dependencies:
+  module:
+    - media
+id: media_save_action
+label: 'Save media'
+type: media
+plugin: media_save_action
+configuration: {  }
diff --git a/core/modules/media/config/optional/system.action.media_unpublish_action.yml b/core/modules/media/config/optional/system.action.media_unpublish_action.yml
new file mode 100644
index 0000000000000000000000000000000000000000..4189e4e743c8192e1ddb388e3b09603f6a65652c
--- /dev/null
+++ b/core/modules/media/config/optional/system.action.media_unpublish_action.yml
@@ -0,0 +1,10 @@
+langcode: en
+status: true
+dependencies:
+  module:
+    - media
+id: media_unpublish_action
+label: 'Unpublish media'
+type: media
+plugin: media_unpublish_action
+configuration: {  }
diff --git a/core/modules/media/config/schema/media.schema.yml b/core/modules/media/config/schema/media.schema.yml
new file mode 100644
index 0000000000000000000000000000000000000000..b326f9b9258e23363281d82f38ac1cc5c7c99e54
--- /dev/null
+++ b/core/modules/media/config/schema/media.schema.yml
@@ -0,0 +1,72 @@
+media.settings:
+  type: config_object
+  label: 'Media settings'
+  mapping:
+    icon_base:
+      type: string
+      label: 'URI where media icons will be installed'
+
+media.type.*:
+  type: config_entity
+  label: 'Media type'
+  mapping:
+    id:
+      type: string
+      label: 'Machine name'
+    label:
+      type: label
+      label: 'Name'
+    description:
+      type: text
+      label: 'Description'
+    handler:
+      type: string
+      label: 'Handler'
+    handler_configuration:
+      type: media.handler.[%parent.handler]
+    queue_thumbnail_downloads:
+      type: boolean
+      label: 'Queue thumbnail downloads'
+    new_revision:
+      type: boolean
+      label: 'Whether a new revision should be created by default'
+    field_map:
+      type: sequence
+      label: 'Field map'
+      sequence:
+        type: string
+
+media.handler.file:
+  type: media.handler.field_aware
+  label: 'File handler configuration'
+
+action.configuration.media_delete_action:
+  type: action_configuration_default
+  label: 'Delete media configuration'
+
+action.configuration.media_save_action:
+  type: action_configuration_default
+  label: 'Save media configuration'
+
+action.configuration.media_publish_action:
+  type: action_configuration_default
+  label: 'Publish media configuration'
+
+action.configuration.media_unpublish_action:
+  type: action_configuration_default
+  label: 'Unpublish media configuration'
+
+field.formatter.settings.media_thumbnail:
+  type: field.formatter.settings.image
+  label: 'Media thumbnail field display format settings'
+
+media.handler.*:
+  type: mapping
+  label: 'Media handler plugin settings'
+
+media.handler.field_aware:
+  type: mapping
+  mapping:
+    source_field:
+      type: string
+      label: 'Source field'
diff --git a/core/modules/media/config/schema/media.views.schema.yml b/core/modules/media/config/schema/media.views.schema.yml
new file mode 100644
index 0000000000000000000000000000000000000000..0c7371d51e8516b6a3ffc66ee85be9660735c073
--- /dev/null
+++ b/core/modules/media/config/schema/media.views.schema.yml
@@ -0,0 +1,5 @@
+# Schema for the views plugins of the Media module.
+
+views.field.media_bulk_form:
+  type: views_field_bulk_form
+  label: 'Media bulk form'
diff --git a/core/modules/media/images/icons/generic.png b/core/modules/media/images/icons/generic.png
new file mode 100644
index 0000000000000000000000000000000000000000..46125e7f6212958869bb83934c28d871929277bd
--- /dev/null
+++ b/core/modules/media/images/icons/generic.png
@@ -0,0 +1,8 @@
+PNG
+
+   IHDR         e   tEXtSoftware Adobe ImageReadyqe<  IDATxK*[Q#ʄ2(8T(.*?>񦏋"$>H)iY(DxvGg-"d7gt_ a%           @@@@@@@@@@           @@@@@@@@@@@    3Ѥ;%,rJrS7==-ubB!LܔEAZ???i;gqJ%Bv}nn΂f|dttTlQp:V5Mz-ԗrIqǣB)ioou#!̂f1111<<ޕxE9ONN~uuu"XX]qᇆǍBL(d2L+uc%	qŸe}[[5wds)bwoYww(^v;r4e?nP0%S3sM*GP<55ՅMMMKKK9ԏ
+pp*ahDĴbfqݲ
+VѺB
+{	9dy׸׮ԽiTI4 G!<qoo"s
+?A2ǗsF*jyzucc#T3M9q𸼼M2D?*oD A@@@@@@@P;JԗC4Hnrsl,{~~fo59$C\TD+ʩ<\__777qf>/uGrXKX*J^C:QX*XHqn(et	rR9jntUΕRF"Uk"reJm---Rş8yiHˋQS+~xd!n,lpe3   H뉨#l6i&5%CJ<y?>>nnn!kr4$HDѮ.395H6tH)~E9jMR5吣H>r r r r rșO@9Ltu8^X7rK\A#%L+_V	j|ǳ9~&NgYHR\NC9ޞDoiJ&ڒ+5쫫tl|!lu=a$Y>xwvv<|M0>H       @@@@@@@@@@           @@@@@@@@@@@        5O 
+a?    IENDB`
\ No newline at end of file
diff --git a/core/modules/media/js/media_form.js b/core/modules/media/js/media_form.js
new file mode 100644
index 0000000000000000000000000000000000000000..f9c2d1163eae4b3f07103ab25dcb6c29596f76fb
--- /dev/null
+++ b/core/modules/media/js/media_form.js
@@ -0,0 +1,40 @@
+/**
+ * @file
+ * Defines Javascript behaviors for the media entity form.
+ */
+
+(function ($, Drupal) {
+
+  'use strict';
+
+  /**
+   * Behaviors for tabs in the media edit form.
+   *
+   * @type {Drupal~behavior}
+   *
+   * @prop {Drupal~behaviorAttach} attach
+   *   Attaches summary behavior for tabs in the media edit form.
+   */
+  Drupal.behaviors.mediaDetailsSummaries = {
+    attach: function (context) {
+      var $context = $(context);
+
+      $context.find('.media-form-author').drupalSetSummary(function (context) {
+        var $authorContext = $(context);
+        var name = $authorContext.find('.field--name-uid input').val();
+        var date = $authorContext.find('.field--name-created input').val();
+
+        if (name && date) {
+          return Drupal.t('By @name on @date', {'@name': name, '@date': date});
+        }
+        else if (name) {
+          return Drupal.t('By @name', {'@name': name});
+        }
+        else if (date) {
+          return Drupal.t('Authored on @date', {'@date': date});
+        }
+      });
+    }
+  };
+
+})(jQuery, Drupal);
diff --git a/core/modules/media/js/media_type_form.js b/core/modules/media/js/media_type_form.js
new file mode 100644
index 0000000000000000000000000000000000000000..48945eaa257c9e89aa22be420c686bd810a137df
--- /dev/null
+++ b/core/modules/media/js/media_type_form.js
@@ -0,0 +1,46 @@
+/**
+ * @file
+ * Javascript for the media type form.
+ */
+
+(function ($, Drupal) {
+
+  'use strict';
+
+  /**
+   * Behaviors for setting summaries on media type form.
+   *
+   * @type {Drupal~behavior}
+   *
+   * @prop {Drupal~behaviorAttach} attach
+   *   Attaches summary behaviors on media type edit forms.
+   */
+  Drupal.behaviors.mediaBundles = {
+    attach: function (context) {
+      var $context = $(context);
+      // Provide the vertical tab summaries.
+      $context.find('#edit-workflow').drupalSetSummary(function (context) {
+        var vals = [];
+        $(context).find('input[name^="options"]:checked').parent().each(function () {
+          vals.push(Drupal.checkPlain($(this).find('label').text()));
+        });
+        if (!$(context).find('#edit-options-status').is(':checked')) {
+          vals.unshift(Drupal.t('Not published'));
+        }
+        return vals.join(', ');
+      });
+      $(context).find('#edit-language').drupalSetSummary(function (context) {
+        var vals = [];
+
+        vals.push($(context).find('.js-form-item-language-configuration-langcode select option:selected').text());
+
+        $(context).find('input:checked').next('label').each(function () {
+          vals.push(Drupal.checkPlain($(this).text()));
+        });
+
+        return vals.join(', ');
+      });
+    }
+  };
+
+})(jQuery, Drupal);
diff --git a/core/modules/media/media.api.php b/core/modules/media/media.api.php
new file mode 100644
index 0000000000000000000000000000000000000000..bd5df5299074585817a131cbcb02f4ac82d9432d
--- /dev/null
+++ b/core/modules/media/media.api.php
@@ -0,0 +1,25 @@
+<?php
+
+/**
+ * @file
+ * Hooks related to Media and its plugins.
+ */
+
+/**
+ * @addtogroup hooks
+ * @{
+ */
+
+/**
+ * Alter the information provided in \Drupal\media\Annotation\MediaHandler.
+ *
+ * @param array $handlers
+ *   The array of handlers plugin definitions, keyed by plugin ID.
+ */
+function hook_media_handler_info_alter(array &$handlers) {
+  $handlers['youtube']['label'] = t('Youtube rocks!');
+}
+
+/**
+ * @} End of "addtogroup hooks".
+ */
diff --git a/core/modules/media/media.info.yml b/core/modules/media/media.info.yml
new file mode 100644
index 0000000000000000000000000000000000000000..76f67fc9ad2618a1847b6afa8a329cfc2a1b2a3d
--- /dev/null
+++ b/core/modules/media/media.info.yml
@@ -0,0 +1,9 @@
+name: Media
+description: 'Allows for media items to be created and used on the site.'
+type: module
+package: Core
+version: VERSION
+core: 8.x
+dependencies:
+  - image
+  - user
diff --git a/core/modules/media/media.install b/core/modules/media/media.install
new file mode 100644
index 0000000000000000000000000000000000000000..1fb0127d48c8738477e76576cbeef0606b3b73ff
--- /dev/null
+++ b/core/modules/media/media.install
@@ -0,0 +1,15 @@
+<?php
+
+/**
+ * @file
+ * Install, uninstall and update hooks for Media module.
+ */
+
+/**
+ * Implements hook_install().
+ */
+function media_install() {
+  $source = drupal_get_path('module', 'media') . '/images/icons';
+  $destination = \Drupal::config('media.settings')->get('icon_base');
+  media_copy_icons($source, $destination);
+}
diff --git a/core/modules/media/media.libraries.yml b/core/modules/media/media.libraries.yml
new file mode 100644
index 0000000000000000000000000000000000000000..ef286b18bfd12b8428f2a80f64bed3959957d0e6
--- /dev/null
+++ b/core/modules/media/media.libraries.yml
@@ -0,0 +1,13 @@
+media_form:
+  version: VERSION
+  js:
+    'js/media_form.js': {}
+  dependencies:
+    - core/drupal.form
+
+media_type_form:
+  version: VERSION
+  js:
+    'js/media_type_form.js': {}
+  dependencies:
+    - core/drupal.form
diff --git a/core/modules/media/media.links.action.yml b/core/modules/media/media.links.action.yml
new file mode 100644
index 0000000000000000000000000000000000000000..99ddcd84e9cabf8d5c55a15cc21639ceefb82860
--- /dev/null
+++ b/core/modules/media/media.links.action.yml
@@ -0,0 +1,10 @@
+media.bundle_add:
+  route_name: entity.media_type.add_form
+  title: 'Add media type'
+  appears_on:
+    - entity.media_type.collection
+
+media.add:
+  route_name: entity.media.add_page
+  title: 'Add media'
+  weight: 10
diff --git a/core/modules/media/media.links.contextual.yml b/core/modules/media/media.links.contextual.yml
new file mode 100644
index 0000000000000000000000000000000000000000..1945ef5001f5d2b530fab18e5d291e74cddd8920
--- /dev/null
+++ b/core/modules/media/media.links.contextual.yml
@@ -0,0 +1,10 @@
+entity.media.edit_form:
+  route_name: entity.media.edit_form
+  group: media
+  title: Edit
+
+entity.media.delete_form:
+  route_name: entity.media.delete_form
+  group: media
+  title: Delete
+  weight: 10
diff --git a/core/modules/media/media.links.menu.yml b/core/modules/media/media.links.menu.yml
new file mode 100644
index 0000000000000000000000000000000000000000..60c5bff17fc1afe318cac562493fa5a7325be6c7
--- /dev/null
+++ b/core/modules/media/media.links.menu.yml
@@ -0,0 +1,11 @@
+entity.media_type.collection:
+  title: 'Media types'
+  parent: system.admin_structure
+  description: 'Manage media types.'
+  route_name: entity.media_type.collection
+
+entity.media.add:
+  title: 'Add media'
+  parent: entity.media.collection
+  description: 'Add a new media entity.'
+  route_name: entity.media.add_page
diff --git a/core/modules/media/media.links.task.yml b/core/modules/media/media.links.task.yml
new file mode 100644
index 0000000000000000000000000000000000000000..af33e94f9a834c56d2dcbb9b4b8436e2f1adcbd7
--- /dev/null
+++ b/core/modules/media/media.links.task.yml
@@ -0,0 +1,25 @@
+entity.media.canonical:
+  route_name: entity.media.canonical
+  base_route: entity.media.canonical
+  title: 'View'
+
+entity.media.edit_form:
+  route_name: entity.media.edit_form
+  base_route: entity.media.canonical
+  title: Edit
+
+entity.media.delete_form:
+  route_name: entity.media.delete_form
+  base_route: entity.media.canonical
+  title: Delete
+  weight: 10
+
+entity.media_type.edit_form:
+  title: 'Edit'
+  route_name: entity.media_type.edit_form
+  base_route: entity.media_type.edit_form
+
+entity.media_type.collection:
+  title: List
+  route_name: entity.media_type.collection
+  base_route: entity.media_type.collection
diff --git a/core/modules/media/media.module b/core/modules/media/media.module
new file mode 100644
index 0000000000000000000000000000000000000000..9d3c80444da51ac99e6ebce0404d733e079c0655
--- /dev/null
+++ b/core/modules/media/media.module
@@ -0,0 +1,85 @@
+<?php
+
+/**
+ * @file
+ * Provides media entities.
+ */
+
+use Drupal\Core\Routing\RouteMatchInterface;
+use Drupal\Core\Url;
+
+/**
+ * Implements hook_help().
+ */
+function media_help($route_name, RouteMatchInterface $route_match) {
+  switch ($route_name) {
+    case 'help.page.media':
+      $output = '<h3>' . t('About') . '</h3>';
+      $output .= '<p>' . t('The Media module manages the creation, editing, deletion, settings and display of media. Items are typically images, documents, slideshows, YouTube videos, Tweets, Instagram photos, etc. You can reference media items from any other content on your site. For more information, see the <a href=":media">online documentation for the Media module</a>.', [':media' => 'https://www.drupal.org/docs/8/core/modules/media']) . '</p>';
+      $output .= '<h3>' . t('Uses') . '</h3>';
+      $output .= '<dl>';
+      $output .= '<dt>' . t('Creating media items') . '</dt>';
+      $output .= '<dd>' . t('When a new media item is created, the Media module records basic information about it, including the author, date of creation, and the <a href=":media-type">Media type</a>. It also manages the <em>publishing options</em>, which define whether or not the item is published. Default settings can be configured for each <a href=":media-type">type of media</a> on your site.', [':media-type' => Url::fromRoute('entity.media_type.collection')]) . '</dd>';
+      $output .= '<dt>' . t('Creating custom media types') . '</dt>';
+      $output .= '<dd>' . t('The Media module gives users with the <em>Administer media types</em> permission the ability to <a href=":media-new">create new media types</a> in addition to the default ones already configured. Each media type has an associated media handler (such as the image handler) which support thumbnail generation and metadata extraction. Fields managed by the <a href=":field">Field module</a> may be added for storing that metadata, such as width and height, as well as any other associated values.', [':media-new' => Url::fromRoute('entity.media_type.add_form'), ':field' => Url::fromRoute('help.page', ['name' => 'field'])]) . '</dd>';
+      $output .= '<dt>' . t('Creating revisions') . '</dt>';
+      $output .= '<dd>' . t('The Media module also enables you to create multiple versions of any media item, and revert to older versions using the <em>Revision information</em> settings.') . '</dd>';
+      $output .= '<dt>' . t('User permissions') . '</dt>';
+      $output .= '<dd>' . t('The Media module makes a number of permissions available, which can be set by role on the <a href=":permissions">permissions page</a>.', [':permissions' => Url::fromRoute('user.admin_permissions', [], ['fragment' => 'module-media'])]) . '</dd>';
+      $output .= '</dl>';
+      return $output;
+  }
+}
+
+/**
+ * Implements hook_theme().
+ */
+function media_theme() {
+  return [
+    'media' => [
+      'render element' => 'elements',
+      'file' => 'media.theme.inc',
+      'template' => 'media',
+    ],
+  ];
+}
+
+/**
+ * Implements hook_theme_suggestions_HOOK().
+ */
+function media_theme_suggestions_media(array $variables) {
+  $suggestions = [];
+  $media = $variables['elements']['#media'];
+  $sanitized_view_mode = strtr($variables['elements']['#view_mode'], '.', '_');
+
+  $suggestions[] = 'media__' . $sanitized_view_mode;
+  $suggestions[] = 'media__' . $media->bundle();
+  $suggestions[] = 'media__' . $media->bundle() . '__' . $sanitized_view_mode;
+
+  return $suggestions;
+}
+
+/**
+ * Copies the media file icons to files directory for use with image styles.
+ *
+ * @param string $source
+ *   Source folder.
+ * @param string $destination
+ *   Destination folder.
+ *
+ * @throws \RuntimeException
+ *   Thrown when media icons can't be copied to their destination.
+ */
+function media_copy_icons($source, $destination) {
+  if (!file_prepare_directory($destination, FILE_CREATE_DIRECTORY | FILE_MODIFY_PERMISSIONS)) {
+    throw new \RuntimeException("Unable to create directory $destination.");
+  }
+
+  $files = file_scan_directory($source, '/.*\.(png|jpg)$/');
+  foreach ($files as $file) {
+    $result = file_unmanaged_copy($file->uri, $destination, FILE_EXISTS_REPLACE);
+    if (!$result) {
+      throw new \RuntimeException("Unable to copy {$file->uri} to $destination.");
+    }
+  }
+}
diff --git a/core/modules/media/media.permissions.yml b/core/modules/media/media.permissions.yml
new file mode 100644
index 0000000000000000000000000000000000000000..f0d41a3bf52d810b2d95d52a1a2ff82a89594810
--- /dev/null
+++ b/core/modules/media/media.permissions.yml
@@ -0,0 +1,26 @@
+administer media:
+  title: 'Administer media'
+  restrict access: TRUE
+
+administer media types:
+  title: 'Administer media types'
+  restrict access: TRUE
+
+view media:
+  title: 'View media'
+
+update media:
+  title: 'Update own media'
+
+update any media:
+  title: 'Update any media'
+
+delete media:
+  title:  'Delete own media'
+
+delete any media:
+  title:  'Delete any media'
+  restrict access: TRUE
+
+create media:
+  title: 'Create media'
diff --git a/core/modules/media/media.routing.yml b/core/modules/media/media.routing.yml
new file mode 100644
index 0000000000000000000000000000000000000000..33709b92d7edb33848f8280fd928c394a47d138f
--- /dev/null
+++ b/core/modules/media/media.routing.yml
@@ -0,0 +1,6 @@
+entity.media.multiple_delete_confirm:
+  path: '/admin/content/media/delete'
+  defaults:
+    _form: '\Drupal\media\Form\DeleteMultiple'
+  requirements:
+    _permission: 'delete any media'
diff --git a/core/modules/media/media.services.yml b/core/modules/media/media.services.yml
new file mode 100644
index 0000000000000000000000000000000000000000..730e2d8365065ac68266685f3d955500a5324f10
--- /dev/null
+++ b/core/modules/media/media.services.yml
@@ -0,0 +1,8 @@
+services:
+  plugin.manager.media.handler:
+    class: Drupal\media\MediaHandlerManager
+    parent: default_plugin_manager
+
+  media.thumbnail_handler:
+    class: Drupal\media\MediaThumbnailHandler
+    arguments: ['@entity_type.manager', '@string_translation']
diff --git a/core/modules/media/media.theme.inc b/core/modules/media/media.theme.inc
new file mode 100644
index 0000000000000000000000000000000000000000..0b1bbc9186d30a70841c6fd7089b2c5561bb564e
--- /dev/null
+++ b/core/modules/media/media.theme.inc
@@ -0,0 +1,28 @@
+<?php
+
+/**
+ * @file
+ * Theme functions for the media module.
+ */
+
+use Drupal\Core\Render\Element;
+
+/**
+ * Prepares variables for media templates.
+ *
+ * Default template: media.html.twig.
+ *
+ * @param array $variables
+ *   An associative array containing:
+ *   - media: An individual media for display.
+ */
+function template_preprocess_media(array &$variables) {
+  $variables['media'] = $variables['elements']['#media'];
+  $variables['view_mode'] = $variables['elements']['#view_mode'];
+  $variables['name'] = $variables['media']->label();
+
+  // Helpful $content variable for templates.
+  foreach (Element::children($variables['elements']) as $key) {
+    $variables['content'][$key] = $variables['elements'][$key];
+  }
+}
diff --git a/core/modules/media/media.tokens.inc b/core/modules/media/media.tokens.inc
new file mode 100644
index 0000000000000000000000000000000000000000..205872ef60fc0a35ceb4a1c6493552049498f370
--- /dev/null
+++ b/core/modules/media/media.tokens.inc
@@ -0,0 +1,177 @@
+<?php
+
+/**
+ * @file
+ * Builds placeholder replacement tokens for media-related data.
+ */
+
+use Drupal\Core\Datetime\Entity\DateFormat;
+use Drupal\Core\Language\LanguageInterface;
+use Drupal\Core\Render\BubbleableMetadata;
+
+/**
+ * Implements hook_token_info().
+ */
+function media_token_info() {
+  $type = [
+    'name' => t('Media'),
+    'description' => t('Tokens related to individual media items.'),
+    'needs-data' => 'media',
+  ];
+
+  // Core tokens for media.
+  $media['mid'] = [
+    'name' => t('Media ID'),
+    'description' => t('The unique ID of the media item.'),
+  ];
+  $media['uuid'] = [
+    'name' => t('Media UUID'),
+    'description' => t('The unique UUID of the media item.'),
+  ];
+  $media['vid'] = [
+    'name' => t('Revision ID'),
+    'description' => t("'The unique ID of the media's latest revision."),
+  ];
+  $media['bundle'] = [
+    'name' => t('Media type'),
+  ];
+  $media['bundle-name'] = [
+    'name' => t('Media type name'),
+    'description' => t('The human-readable name of the media type.'),
+  ];
+  $media['langcode'] = [
+    'name' => t('Language code'),
+    'description' => t('The language code of the language the media is written in.'),
+  ];
+  $media['name'] = [
+    'name' => t('Name'),
+    'description' => t('The name of this media.'),
+  ];
+  $node['author'] = [
+    'name' => t('Author'),
+    'type' => 'user',
+  ];
+  $media['url'] = [
+    'name' => t('URL'),
+    'description' => t('The URL of the media.'),
+  ];
+  $media['edit-url'] = [
+    'name' => t('Edit URL'),
+    'description' => t("The URL of the media's edit page."),
+  ];
+
+  // Chained tokens for media.
+  $media['created'] = [
+    'name' => t('Date created'),
+    'type' => 'date',
+  ];
+  $media['changed'] = [
+    'name' => t('Date changed'),
+    'description' => t('The date the media was most recently updated.'),
+    'type' => 'date',
+  ];
+
+  return [
+    'types' => ['media' => $type],
+    'tokens' => ['media' => $media],
+  ];
+}
+
+/**
+ * Implements hook_tokens().
+ */
+function media_tokens($type, $tokens, array $data, array $options, BubbleableMetadata $bubbleable_metadata) {
+  $token_service = \Drupal::token();
+
+  $url_options = ['absolute' => TRUE];
+  if (isset($options['langcode'])) {
+    $url_options['language'] = \Drupal::languageManager()->getLanguage($options['langcode']);
+    $langcode = $options['langcode'];
+  }
+  else {
+    $langcode = LanguageInterface::LANGCODE_DEFAULT;
+  }
+
+  $replacements = [];
+  if ($type == 'media' && !empty($data['media'])) {
+    /** @var \Drupal\media\MediaInterface $media */
+    $media = \Drupal::service('entity.repository')->getTranslationFromContext($data['media'], $langcode, ['operation' => 'media_entity_tokens']);
+
+    foreach ($tokens as $name => $original) {
+      switch ($name) {
+        // Simple key values on the media_entity.
+        case 'mid':
+          $replacements[$original] = $media->id();
+          break;
+
+        case 'uuid':
+          $replacements[$original] = $media->uuid();
+          break;
+
+        case 'vid':
+          $replacements[$original] = $media->getRevisionId();
+          break;
+
+        case 'bundle':
+          $replacements[$original] = $media->bundle();
+          break;
+
+        case 'bundle-name':
+          $replacements[$original] = $media->bundle->entity->label();
+          break;
+
+        case 'langcode':
+          $replacements[$original] = $media->language()->getId();
+          break;
+
+        case 'name':
+          $replacements[$original] = $media->label();
+          break;
+
+        case 'url':
+          $replacements[$original] = $media->toUrl('canonical', $url_options);
+          break;
+
+        case 'edit-url':
+          $replacements[$original] = $media->toUrl('edit-form', $url_options);
+          break;
+
+        // Default values for the chained tokens handled below.
+        case 'author':
+          $account = $media->getOwner();
+          $bubbleable_metadata->addCacheableDependency($account);
+          $replacements[$original] = $account->label();
+          break;
+
+        case 'created':
+          $date_format = DateFormat::load('medium');
+          $bubbleable_metadata->addCacheableDependency($date_format);
+          $replacements[$original] = \Drupal::service('date.formatter')
+            ->format($media->getCreatedTime(), 'medium', '', NULL, $langcode);
+          break;
+
+        case 'changed':
+          $date_format = DateFormat::load('medium');
+          $bubbleable_metadata->addCacheableDependency($date_format);
+          $replacements[$original] = \Drupal::service('date.formatter')
+            ->format($media->getChangedTime(), 'medium', '', NULL, $langcode);
+          break;
+      }
+    }
+
+    if ($author_tokens = $token_service->findWithPrefix($tokens, 'author')) {
+      $account = $media->get('uid')->entity;
+      $replacements += $token_service->generate('user', $author_tokens, ['user' => $account], $options, $bubbleable_metadata);
+    }
+
+    if ($created_tokens = $token_service->findWithPrefix($tokens, 'created')) {
+      $replacements += $token_service->generate('date', $created_tokens, ['date' => $media->getCreatedTime()], $options, $bubbleable_metadata);
+    }
+
+    if ($changed_tokens = $token_service->findWithPrefix($tokens, 'changed')) {
+      $replacements += $token_service->generate('date', $changed_tokens, ['date' => $media->getChangedTime()], $options, $bubbleable_metadata);
+    }
+  }
+
+  return $replacements;
+}
diff --git a/core/modules/media/src/Annotation/MediaHandler.php b/core/modules/media/src/Annotation/MediaHandler.php
new file mode 100644
index 0000000000000000000000000000000000000000..14c82c3e5e918109e0b04f79df3b8100067db90e
--- /dev/null
+++ b/core/modules/media/src/Annotation/MediaHandler.php
@@ -0,0 +1,62 @@
+<?php
+
+namespace Drupal\media\Annotation;
+
+use Drupal\Component\Annotation\Plugin;
+
+/**
+ * Defines a media handler plugin annotation object.
+ *
+ * Media handlers are responsible for implementing all the logic for dealing
+ * with a particular type of media asset. They provide various universal and
+ * type-specific metadata about media assets of the type they handle.
+ *
+ * Plugin namespace: Plugin\media\Handler
+ *
+ * For a working example, see \Drupal\media\Plugin\media\Handler\File.
+ *
+ * @see \Drupal\media\MediaHandlerInterface
+ * @see \Drupal\media\MediaHandlerBase
+ * @see \Drupal\media\MediaHandlerManager
+ * @see hook_media_handler_info_alter()
+ * @see plugin_api
+ *
+ * @Annotation
+ */
+class MediaHandler extends Plugin {
+
+  /**
+   * The plugin ID.
+   *
+   * @var string
+   */
+  public $id;
+
+  /**
+   * The human-readable name of the handler.
+   *
+   * @ingroup plugin_translatable
+   *
+   * @var \Drupal\Core\Annotation\Translation
+   */
+  public $label;
+
+  /**
+   * A brief description of the plugin.
+   *
+   * This will be shown when adding or configuring this display.
+   *
+   * @ingroup plugin_translatable
+   *
+   * @var \Drupal\Core\Annotation\Translation
+   */
+  public $description = '';
+
+  /**
+   * The field types that can be used as a source field for this handler.
+   *
+   * @var string[]
+   */
+  public $allowed_field_types = [];
+
+}
diff --git a/core/modules/media/src/Entity/Media.php b/core/modules/media/src/Entity/Media.php
new file mode 100644
index 0000000000000000000000000000000000000000..55bccf562546afdca33899d6f80fb49ee3c96257
--- /dev/null
+++ b/core/modules/media/src/Entity/Media.php
@@ -0,0 +1,381 @@
+<?php
+
+namespace Drupal\media\Entity;
+
+use Drupal\Core\Entity\ContentEntityBase;
+use Drupal\Core\Entity\EntityPublishedTrait;
+use Drupal\Core\Entity\EntityStorageInterface;
+use Drupal\Core\Entity\EntityTypeInterface;
+use Drupal\Core\Field\BaseFieldDefinition;
+use Drupal\media\MediaInterface;
+use Drupal\Core\Entity\EntityChangedTrait;
+use Drupal\user\UserInterface;
+
+/**
+ * Defines the media entity class.
+ *
+ * @ContentEntityType(
+ *   id = "media",
+ *   label = @Translation("Media"),
+ *   label_singular = @Translation("media item"),
+ *   label_plural = @Translation("media items"),
+ *   label_count = @PluralTranslation(
+ *     singular = "@count media item",
+ *     plural = "@count media items"
+ *   ),
+ *   bundle_label = @Translation("Media type"),
+ *   handlers = {
+ *     "storage" = "Drupal\Core\Entity\Sql\SqlContentEntityStorage",
+ *     "view_builder" = "Drupal\Core\Entity\EntityViewBuilder",
+ *     "list_builder" = "Drupal\Core\Entity\EntityListBuilder",
+ *     "access" = "Drupal\media\MediaAccessController",
+ *     "form" = {
+ *       "add" = "Drupal\media\MediaForm",
+ *       "edit" = "Drupal\media\MediaForm",
+ *       "delete" = "Drupal\Core\Entity\ContentEntityDeleteForm",
+ *     },
+ *     "translation" = "Drupal\content_translation\ContentTranslationHandler",
+ *     "views_data" = "Drupal\media\MediaViewsData",
+ *     "route_provider" = {
+ *       "html" = "Drupal\Core\Entity\Routing\AdminHtmlRouteProvider",
+ *     }
+ *   },
+ *   base_table = "media",
+ *   data_table = "media_field_data",
+ *   revision_table = "media_revision",
+ *   revision_data_table = "media_field_revision",
+ *   translatable = TRUE,
+ *   show_revision_ui = TRUE,
+ *   entity_keys = {
+ *     "id" = "mid",
+ *     "revision" = "vid",
+ *     "bundle" = "bundle",
+ *     "label" = "name",
+ *     "langcode" = "langcode",
+ *     "uuid" = "uuid",
+ *     "published" = "status",
+ *   },
+ *   bundle_entity_type = "media_type",
+ *   permission_granularity = "entity_type",
+ *   admin_permission = "administer media",
+ *   field_ui_base_route = "entity.media_type.edit_form",
+ *   common_reference_target = TRUE,
+ *   links = {
+ *     "add-page" = "/media/add",
+ *     "add-form" = "/media/add/{media_type}",
+ *     "canonical" = "/media/{media}",
+ *     "delete-form" = "/media/{media}/delete",
+ *     "edit-form" = "/media/{media}/edit",
+ *     "admin-form" = "/admin/structure/media/manage/{media_type}"
+ *   }
+ * )
+ */
+class Media extends ContentEntityBase implements MediaInterface {
+
+  use EntityChangedTrait;
+  use EntityPublishedTrait;
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getCreatedTime() {
+    return $this->get('created')->value;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function setCreatedTime($timestamp) {
+    $this->set('created', $timestamp);
+    return $this;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getOwner() {
+    return $this->get('uid')->entity;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function setOwner(UserInterface $account) {
+    $this->set('uid', $account->id());
+    return $this;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getOwnerId() {
+    return $this->get('uid')->target_id;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function setOwnerId($uid) {
+    $this->set('uid', $uid);
+    return $this;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getHandler() {
+    return $this->bundle->entity->getHandler();
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function preSave(EntityStorageInterface $storage) {
+    parent::preSave($storage);
+
+    // Try to set fields provided by the handler and mapped in bundle config.
+    foreach ($this->bundle->entity->getFieldMap() as $source_field => $destination_field) {
+      $this->getHandler()->mapFieldValue($this, $source_field, $destination_field);
+    }
+
+    // Try to set a default name for this media if no label is provided.
+    if (!$this->label()) {
+      $this->set('name', $this->getHandler()->getDefaultName($this));
+    }
+
+    // Set thumbnail.
+    if (!$this->get('thumbnail')->entity) {
+      \Drupal::service('media.thumbnail_handler')->setThumbnail($this);
+    }
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function postSave(EntityStorageInterface $storage, $update = TRUE) {
+    parent::postSave($storage, $update);
+    if (!$update && $this->bundle->entity->getQueueThumbnailDownloads()) {
+      $queue = \Drupal::queue('media_entity_thumbnail');
+      $queue->createItem(['id' => $this->id()]);
+    }
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function preSaveRevision(EntityStorageInterface $storage, \stdClass $record) {
+    parent::preSaveRevision($storage, $record);
+
+    if (!$this->isNewRevision() && isset($this->original) && empty($record->revision_log)) {
+      // If we are updating an existing node without adding a new revision, we
+      // need to make sure $entity->revision_log is reset whenever it is empty.
+      // Therefore, this code allows us to avoid clobbering an existing log
+      // entry with an empty one.
+      $record->revision_log = $this->original->revision_log->value;
+    }
+
+    if ($this->isNewRevision()) {
+      $record->revision_timestamp = \Drupal::time()->getRequestTime();
+    }
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function validate() {
+    $this->getHandler()->attachConstraints($this);
+    return parent::validate();
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function baseFieldDefinitions(EntityTypeInterface $entity_type) {
+    $fields = parent::baseFieldDefinitions($entity_type);
+    $fields += static::publishedBaseFieldDefinitions($entity_type);
+
+    $fields['name'] = BaseFieldDefinition::create('string')
+      ->setLabel(t('Name'))
+      ->setRequired(TRUE)
+      ->setTranslatable(TRUE)
+      ->setRevisionable(TRUE)
+      ->setDefaultValue('')
+      ->setSetting('max_length', 255)
+      ->setDisplayOptions('form', [
+        'type' => 'string_textfield',
+        'weight' => -5,
+      ])
+      ->setDisplayConfigurable('form', TRUE)
+      ->setDisplayOptions('view', [
+        'label' => 'hidden',
+        'type' => 'string',
+        'weight' => -5,
+      ]);
+
+    $fields['thumbnail'] = BaseFieldDefinition::create('image')
+      ->setLabel(t('Thumbnail'))
+      ->setDescription(t('The thumbnail of the media.'))
+      ->setRevisionable(TRUE)
+      ->setDisplayOptions('view', [
+        'type' => 'image',
+        'weight' => 5,
+        'label' => 'hidden',
+        'settings' => [
+          'image_style' => 'thumbnail',
+        ],
+      ])
+      ->setDisplayConfigurable('view', TRUE)
+      ->setReadOnly(TRUE);
+
+    $fields['uid'] = BaseFieldDefinition::create('entity_reference')
+      ->setLabel(t('Authored by'))
+      ->setDescription(t('The username of the media publisher.'))
+      ->setRevisionable(TRUE)
+      ->setDefaultValueCallback(static::class . '::getCurrentUserId')
+      ->setSetting('target_type', 'user')
+      ->setTranslatable(TRUE)
+      ->setDisplayOptions('form', [
+        'type' => 'entity_reference_autocomplete',
+        'weight' => 5,
+        'settings' => [
+          'match_operator' => 'CONTAINS',
+          'size' => '60',
+          'autocomplete_type' => 'tags',
+          'placeholder' => '',
+        ],
+      ])
+      ->setDisplayConfigurable('form', TRUE)
+      ->setDisplayOptions('view', [
+        'label' => 'hidden',
+        'type' => 'author',
+        'weight' => 0,
+      ])
+      ->setDisplayConfigurable('view', TRUE);
+
+    $fields['created'] = BaseFieldDefinition::create('created')
+      ->setLabel(t('Authored on'))
+      ->setDescription(t('The time the media item was created.'))
+      ->setTranslatable(TRUE)
+      ->setRevisionable(TRUE)
+      ->setDisplayOptions('form', [
+        'type' => 'datetime_timestamp',
+        'weight' => 10,
+      ])
+      ->setDisplayConfigurable('form', TRUE)
+      ->setDisplayOptions('view', [
+        'label' => 'hidden',
+        'type' => 'timestamp',
+        'weight' => 0,
+      ])
+      ->setDisplayConfigurable('view', TRUE);
+
+    $fields['changed'] = BaseFieldDefinition::create('changed')
+      ->setLabel(t('Changed'))
+      ->setDescription(t('The time the media item was last edited.'))
+      ->setTranslatable(TRUE)
+      ->setRevisionable(TRUE);
+
+    $fields['revision_timestamp'] = BaseFieldDefinition::create('created')
+      ->setLabel(t('Revision timestamp'))
+      ->setDescription(t('The time the current revision was created.'))
+      ->setQueryable(FALSE)
+      ->setRevisionable(TRUE);
+
+    $fields['revision_uid'] = BaseFieldDefinition::create('entity_reference')
+      ->setLabel(t('Revision publisher ID'))
+      ->setDescription(t('The user ID of the publisher of the current revision.'))
+      ->setDefaultValueCallback(static::class . '::getCurrentUserId')
+      ->setSetting('target_type', 'user')
+      ->setQueryable(FALSE)
+      ->setRevisionable(TRUE);
+
+    $fields['revision_log'] = BaseFieldDefinition::create('string_long')
+      ->setLabel(t('Revision Log'))
+      ->setDescription(t('The log entry explaining the changes in this revision.'))
+      ->setRevisionable(TRUE)
+      ->setTranslatable(TRUE)
+      ->setDefaultValue('')
+      ->setDisplayOptions('form', array(
+        'type' => 'string_textarea',
+        'weight' => 25,
+        'settings' => array(
+          'rows' => 4,
+        ),
+      ));
+
+    return $fields;
+  }
+
+  /**
+   * Default value callback for 'uid' base field definition.
+   *
+   * @see ::baseFieldDefinitions()
+   *
+   * @return int[]
+   *   An array of default values.
+   */
+  public static function getCurrentUserId() {
+    return [\Drupal::currentUser()->id()];
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getRevisionCreationTime() {
+    return $this->revision_timestamp->value;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function setRevisionCreationTime($timestamp) {
+    $this->revision_timestamp->value = $timestamp;
+    return $this;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getRevisionUser() {
+    return $this->revision_uid->entity;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function setRevisionUser(UserInterface $account) {
+    $this->revision_uid->entity = $account;
+    return $this;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getRevisionUserId() {
+    return $this->revision_uid->target_id;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function setRevisionUserId($user_id) {
+    $this->revision_uid->target_id = $user_id;
+    return $this;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getRevisionLogMessage() {
+    return $this->revision_log->value;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function setRevisionLogMessage($revision_log_message) {
+    $this->revision_log->value = $revision_log_message;
+    return $this;
+  }
+
+}
diff --git a/core/modules/media/src/Entity/MediaType.php b/core/modules/media/src/Entity/MediaType.php
new file mode 100644
index 0000000000000000000000000000000000000000..b4495896f3b7cd4b29e92bbcd1f4c682b024c486
--- /dev/null
+++ b/core/modules/media/src/Entity/MediaType.php
@@ -0,0 +1,309 @@
+<?php
+
+namespace Drupal\media\Entity;
+
+use Drupal\Core\Config\Entity\ConfigEntityBundleBase;
+use Drupal\Core\Entity\EntityStorageInterface;
+use Drupal\Core\Entity\EntityWithPluginCollectionInterface;
+use Drupal\Core\Plugin\DefaultSingleLazyPluginCollection;
+use Drupal\field\FieldStorageConfigInterface;
+use Drupal\media\MediaTypeInterface;
+use Drupal\media\MediaInterface;
+use Drupal\media\SourceFieldInterface;
+
+/**
+ * Defines the Media type configuration entity.
+ *
+ * @ConfigEntityType(
+ *   id = "media_type",
+ *   label = @Translation("Media type"),
+ *   label_singular = @Translation("media type"),
+ *   label_plural = @Translation("media types"),
+ *   label_count = @PluralTranslation(
+ *     singular = "@count media type",
+ *     plural = "@count media types"
+ *   ),
+ *   handlers = {
+ *     "form" = {
+ *       "add" = "Drupal\media\MediaTypeForm",
+ *       "edit" = "Drupal\media\MediaTypeForm",
+ *       "delete" = "Drupal\media\Form\MediaTypeDeleteConfirmForm"
+ *     },
+ *     "list_builder" = "Drupal\media\MediaTypeListBuilder",
+ *     "route_provider" = {
+ *       "html" = "Drupal\Core\Entity\Routing\DefaultHtmlRouteProvider",
+ *     }
+ *   },
+ *   admin_permission = "administer media types",
+ *   config_prefix = "type",
+ *   bundle_of = "media",
+ *   entity_keys = {
+ *     "id" = "id",
+ *     "label" = "label",
+ *     "status" = "status"
+ *   },
+ *   config_export = {
+ *     "id",
+ *     "label",
+ *     "description",
+ *     "handler",
+ *     "queue_thumbnail_downloads",
+ *     "new_revision",
+ *     "handler_configuration",
+ *     "field_map",
+ *     "status",
+ *   },
+ *   links = {
+ *     "add-form" = "/admin/structure/media/add",
+ *     "edit-form" = "/admin/structure/media/manage/{media_type}",
+ *     "delete-form" = "/admin/structure/media/manage/{media_type}/delete",
+ *     "collection" = "/admin/structure/media",
+ *   },
+ * )
+ */
+class MediaType extends ConfigEntityBundleBase implements MediaTypeInterface, EntityWithPluginCollectionInterface {
+
+  /**
+   * The machine name of this media type.
+   *
+   * @var string
+   */
+  protected $id;
+
+  /**
+   * The human-readable name of the media type.
+   *
+   * @var string
+   */
+  protected $label;
+
+  /**
+   * A brief description of this media type.
+   *
+   * @var string
+   */
+  protected $description;
+
+  /**
+   * The handler plugin ID.
+   *
+   * @var string
+   */
+  protected $handler;
+
+  /**
+   * Whether thumbnail downloads are queued.
+   *
+   * @var bool
+   */
+  protected $queue_thumbnail_downloads = FALSE;
+
+  /**
+   * Default value of the 'Create new revision' checkbox of this media type.
+   *
+   * @var bool
+   */
+  protected $new_revision = FALSE;
+
+  /**
+   * The handler plugin configuration.
+   *
+   * @var array
+   */
+  protected $handler_configuration = [];
+
+  /**
+   * Lazy collection for the handler plugin.
+   *
+   * @var \Drupal\Core\Plugin\DefaultSingleLazyPluginCollection
+   */
+  protected $handlerPluginCollection;
+
+  /**
+   * Field map. Fields provided by type plugin to be stored as entity fields.
+   *
+   * @var array
+   */
+  protected $field_map = [];
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getPluginCollections() {
+    return [
+      'handler_configuration' => $this->handlerPluginCollection(),
+    ];
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function getLabel(MediaInterface $media) {
+    $bundle = static::load($media->bundle());
+    return $bundle ? $bundle->label() : FALSE;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getDescription() {
+    return $this->description;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function setDescription($description) {
+    $this->description = $description;
+    return $this;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getHandlerConfiguration() {
+    return $this->handler_configuration;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function setHandlerConfiguration(array $configuration) {
+    $this->handler_configuration = $configuration;
+    $this->handlerPluginCollection = NULL;
+    return $this;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getQueueThumbnailDownloads() {
+    return $this->queue_thumbnail_downloads;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function setQueueThumbnailDownloads($queue_thumbnail_downloads) {
+    $this->queue_thumbnail_downloads = $queue_thumbnail_downloads;
+    return $this;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getHandler() {
+    return $this->handlerPluginCollection()->get($this->handler);
+  }
+
+  /**
+   * Returns handler lazy plugin collection.
+   *
+   * @return \Drupal\Core\Plugin\DefaultSingleLazyPluginCollection
+   *   The tag plugin collection.
+   */
+  protected function handlerPluginCollection() {
+    if (!$this->handlerPluginCollection) {
+      $this->handlerPluginCollection = new DefaultSingleLazyPluginCollection(\Drupal::service('plugin.manager.media.handler'), $this->handler, $this->handler_configuration);
+    }
+    return $this->handlerPluginCollection;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getStatus() {
+    return $this->status;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function shouldCreateNewRevision() {
+    return $this->new_revision;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function setNewRevision($new_revision) {
+    $this->new_revision = $new_revision;
+    return $this;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function preSave(EntityStorageInterface $storage) {
+    parent::preSave($storage);
+
+    // If the handler uses a source field, we'll need to store its name before
+    // saving. We'd need to double-save if we did this in postSave().
+    $handler = $this->getHandler();
+    if ($handler instanceof SourceFieldInterface) {
+      $storage = $handler->getSourceField($this)->getFieldStorageDefinition();
+      // If the field storage is a new (unsaved) config entity, save it.
+      if ($storage instanceof FieldStorageConfigInterface && $storage->isNew()) {
+        $storage->save();
+      }
+      // Store the field name. We always want to update this value because the
+      // field name may have changed, or a new field may have been created,
+      // depending on the user's actions or the handler's behavior.
+      $configuration = $handler->getConfiguration();
+      $configuration['source_field'] = $storage->getName();
+      $this->setHandlerConfiguration($configuration);
+    }
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function postSave(EntityStorageInterface $storage, $update = TRUE) {
+    parent::postSave($storage, $update);
+
+    // If the handler is using a source field, we may need to save it if it's
+    // new. The field storage is guaranteed to exist already because preSave()
+    // took care of that.
+    $handler = $this->getHandler();
+    if ($handler instanceof SourceFieldInterface) {
+      $field = $handler->getSourceField($this);
+
+      // If the field is new, save it and add it to this bundle's view and form
+      // displays.
+      if ($field->isNew()) {
+        // Ensure the field is saved correctly before adding it to the displays.
+        $field->save();
+
+        $entity_type = $field->getTargetEntityTypeId();
+        $bundle = $field->getTargetBundle();
+
+        if ($field->isDisplayConfigurable('form')) {
+          // Use the default widget and settings.
+          $component = \Drupal::service('plugin.manager.field.widget')
+            ->prepareConfiguration($field->getType(), []);
+
+          entity_get_form_display($entity_type, $bundle, 'default')
+            ->setComponent($field->getName(), $component)
+            ->save();
+        }
+        if ($field->isDisplayConfigurable('view')) {
+          // Use the default formatter and settings.
+          $component = \Drupal::service('plugin.manager.field.formatter')
+            ->prepareConfiguration($field->getType(), []);
+
+          entity_get_display($entity_type, $bundle, 'default')
+            ->setComponent($field->getName(), $component)
+            ->save();
+        }
+      }
+    }
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getFieldMap() {
+    return $this->field_map;
+  }
+
+}
diff --git a/core/modules/media/src/Form/DeleteMultiple.php b/core/modules/media/src/Form/DeleteMultiple.php
new file mode 100644
index 0000000000000000000000000000000000000000..4832f41e3705f27327221a80866d927d6f479581
--- /dev/null
+++ b/core/modules/media/src/Form/DeleteMultiple.php
@@ -0,0 +1,197 @@
+<?php
+
+namespace Drupal\media\Form;
+
+use Drupal\Core\Entity\EntityTypeManagerInterface;
+use Drupal\Core\Form\ConfirmFormBase;
+use Drupal\Core\Form\FormStateInterface;
+use Drupal\Core\Url;
+use Drupal\user\PrivateTempStoreFactory;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+use Symfony\Component\HttpFoundation\RedirectResponse;
+
+/**
+ * Provides a media deletion confirmation form.
+ */
+class DeleteMultiple extends ConfirmFormBase {
+
+  /**
+   * The array of media entities to delete.
+   *
+   * @var string[][]
+   */
+  protected $entityInfo = [];
+
+  /**
+   * The tempstore factory.
+   *
+   * @var \Drupal\user\PrivateTempStoreFactory
+   */
+  protected $tempStoreFactory;
+
+  /**
+   * The entity storage.
+   *
+   * @var \Drupal\Core\Entity\EntityStorageInterface
+   */
+  protected $storage;
+
+  /**
+   * Constructs a DeleteMultiple form object.
+   *
+   * @param \Drupal\user\PrivateTempStoreFactory $temp_store_factory
+   *   The tempstore factory.
+   * @param \Drupal\Core\Entity\EntityTypeManagerInterface $manager
+   *   The entity manager.
+   */
+  public function __construct(PrivateTempStoreFactory $temp_store_factory, EntityTypeManagerInterface $manager) {
+    $this->tempStoreFactory = $temp_store_factory;
+    $this->storage = $manager->getStorage('media');
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function create(ContainerInterface $container) {
+    return new static(
+      $container->get('user.private_tempstore'),
+      $container->get('entity_type.manager')
+    );
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getFormId() {
+    return 'media_multiple_delete_confirm';
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getQuestion() {
+    return $this->formatPlural(count($this->entityInfo), 'Are you sure you want to delete this item?', 'Are you sure you want to delete these items?');
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getCancelUrl() {
+    return new Url('system.admin_content');
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getConfirmText() {
+    return $this->t('Delete');
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function buildForm(array $form, FormStateInterface $form_state) {
+    $this->entityInfo = $this->tempStoreFactory->get('media_multiple_delete_confirm')->get($this->currentUser()->id());
+    if (empty($this->entityInfo)) {
+      return new RedirectResponse($this->getCancelUrl()->setAbsolute()->toString());
+    }
+    /** @var \Drupal\media\MediaInterface[] $entities */
+    $entities = $this->storage->loadMultiple(array_keys($this->entityInfo));
+
+    $items = [];
+    foreach ($this->entityInfo as $id => $langcodes) {
+      foreach ($langcodes as $langcode) {
+        $entity = $entities[$id]->getTranslation($langcode);
+        $key = $id . ':' . $langcode;
+        $default_key = $id . ':' . $entity->getUntranslated()->language()->getId();
+
+        // If we have a translated entity we build a nested list of translations
+        // that will be deleted.
+        $languages = $entity->getTranslationLanguages();
+        if (count($languages) > 1 && $entity->isDefaultTranslation()) {
+          $names = [];
+          foreach ($languages as $translation_langcode => $language) {
+            $names[] = $language->getName();
+            unset($items[$id . ':' . $translation_langcode]);
+          }
+          $items[$default_key] = [
+            'label' => [
+              '#markup' => $this->t('@label (Original translation) - <em>The following translations will be deleted:</em>', ['@label' => $entity->label()]),
+            ],
+            'deleted_translations' => [
+              '#theme' => 'item_list',
+              '#items' => $names,
+            ],
+          ];
+        }
+        elseif (!isset($items[$default_key])) {
+          $items[$key] = $entity->label();
+        }
+      }
+    }
+
+    $form['entities'] = [
+      '#theme' => 'item_list',
+      '#items' => $items,
+    ];
+    return parent::buildForm($form, $form_state);
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function submitForm(array &$form, FormStateInterface $form_state) {
+    if ($form_state->getValue('confirm') && !empty($this->entityInfo)) {
+      $total_count = 0;
+      $delete_entities = [];
+      /** @var \Drupal\Core\Entity\ContentEntityInterface[][] $delete_translations */
+      $delete_translations = [];
+      /** @var \Drupal\media\MediaInterface[] $entities */
+      $entities = $this->storage->loadMultiple(array_keys($this->entityInfo));
+
+      foreach ($this->entityInfo as $id => $langcodes) {
+        foreach ($langcodes as $langcode) {
+          $entity = $entities[$id]->getTranslation($langcode);
+          if ($entity->isDefaultTranslation()) {
+            $delete_entities[$id] = $entity;
+            unset($delete_translations[$id]);
+            $total_count += count($entity->getTranslationLanguages());
+          }
+          elseif (!isset($delete_entities[$id])) {
+            $delete_translations[$id][] = $entity;
+          }
+        }
+      }
+
+      if ($delete_entities) {
+        $this->storage->delete($delete_entities);
+        $this->logger('media')->notice('Deleted @count media entities.', ['@count' => count($delete_entities)]);
+      }
+
+      if ($delete_translations) {
+        $count = 0;
+        foreach ($delete_translations as $id => $translations) {
+          $entity = $entities[$id]->getUntranslated();
+          foreach ($translations as $translation) {
+            $entity->removeTranslation($translation->language()->getId());
+          }
+          $entity->save();
+          $count += count($translations);
+        }
+        if ($count) {
+          $total_count += $count;
+          $this->logger('media')->notice('Deleted @count media translations.', ['@count' => $count]);
+        }
+      }
+
+      if ($total_count) {
+        drupal_set_message($this->formatPlural($total_count, 'Deleted 1 media entity.', 'Deleted @count media entities.'));
+      }
+
+      $this->tempStoreFactory->get('media_multiple_delete_confirm')->delete(\Drupal::currentUser()->id());
+    }
+
+    $form_state->setRedirect('system.admin_content');
+  }
+
+}
diff --git a/core/modules/media/src/Form/MediaTypeDeleteConfirmForm.php b/core/modules/media/src/Form/MediaTypeDeleteConfirmForm.php
new file mode 100644
index 0000000000000000000000000000000000000000..5bf9d63cc8babccda34370c7d2498eb9245921fe
--- /dev/null
+++ b/core/modules/media/src/Form/MediaTypeDeleteConfirmForm.php
@@ -0,0 +1,68 @@
+<?php
+
+namespace Drupal\media\Form;
+
+use Drupal\Core\Entity\Query\QueryFactory;
+use Drupal\Core\Entity\EntityDeleteForm;
+use Drupal\Core\Form\FormStateInterface;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+
+/**
+ * Provides a form for media type deletion.
+ */
+class MediaTypeDeleteConfirmForm extends EntityDeleteForm {
+
+  /**
+   * The query factory to create entity queries.
+   *
+   * @var \Drupal\Core\Entity\Query\QueryFactory
+   */
+  protected $queryFactory;
+
+  /**
+   * Constructs a new MediaTypeDeleteConfirm object.
+   *
+   * @param \Drupal\Core\Entity\Query\QueryFactory $query_factory
+   *   The entity query object.
+   */
+  public function __construct(QueryFactory $query_factory) {
+    $this->queryFactory = $query_factory;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function create(ContainerInterface $container) {
+    return new static(
+      $container->get('entity.query')
+    );
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function buildForm(array $form, FormStateInterface $form_state) {
+    $num_entities = $this->queryFactory->get('media')
+      ->condition('bundle', $this->entity->id())
+      ->count()
+      ->execute();
+    if ($num_entities) {
+      $form['#title'] = $this->getQuestion();
+      $form['description'] = [
+        '#type' => 'inline_template',
+        '#template' => '<p>{{ message }}</p>',
+        '#context' => [
+          'message' => $this->formatPlural($num_entities,
+            '%type is used by @count piece of content on your site. You can not remove this content type until you have removed all of the %type content.',
+            '%type is used by @count pieces of content on your site. You may not remove %type until you have removed all of the %type content.',
+            ['%type' => $this->entity->label()]),
+        ],
+      ];
+
+      return $form;
+    }
+
+    return parent::buildForm($form, $form_state);
+  }
+
+}
diff --git a/core/modules/media/src/MediaAccessController.php b/core/modules/media/src/MediaAccessController.php
new file mode 100644
index 0000000000000000000000000000000000000000..9ddd60a7b90d0d43800702a865a51a35d5646586
--- /dev/null
+++ b/core/modules/media/src/MediaAccessController.php
@@ -0,0 +1,46 @@
+<?php
+
+namespace Drupal\media;
+
+use Drupal\Core\Access\AccessResult;
+use Drupal\Core\Entity\EntityAccessControlHandler;
+use Drupal\Core\Entity\EntityInterface;
+use Drupal\Core\Session\AccountInterface;
+
+/**
+ * Defines an access controller for the media entity.
+ */
+class MediaAccessController extends EntityAccessControlHandler {
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function checkAccess(EntityInterface $entity, $operation, AccountInterface $account) {
+    if ($account->hasPermission('administer media')) {
+      return AccessResult::allowed()->cachePerPermissions();
+    }
+
+    $is_owner = ($account->id() && $account->id() == $entity->getOwnerId());
+    switch ($operation) {
+      case 'view':
+        return AccessResult::allowedIf($account->hasPermission('view media') && $entity->isPublished())->cachePerPermissions()->addCacheableDependency($entity);
+
+      case 'update':
+        return AccessResult::allowedIf(($account->hasPermission('update media') && $is_owner) || $account->hasPermission('update any media'))->cachePerPermissions()->cachePerUser()->addCacheableDependency($entity);
+
+      case 'delete':
+        return AccessResult::allowedIf(($account->hasPermission('delete media') && $is_owner) ||  $account->hasPermission('delete any media'))->cachePerPermissions()->cachePerUser()->addCacheableDependency($entity);
+    }
+
+    // No opinion.
+    return AccessResult::neutral()->cachePerPermissions();
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function checkCreateAccess(AccountInterface $account, array $context, $entity_bundle = NULL) {
+    return AccessResult::allowedIfHasPermission($account, 'create media');
+  }
+
+}
diff --git a/core/modules/media/src/MediaForm.php b/core/modules/media/src/MediaForm.php
new file mode 100644
index 0000000000000000000000000000000000000000..7bd1ceaed008e4cbc3a05ef2d4c02806c5cbe216
--- /dev/null
+++ b/core/modules/media/src/MediaForm.php
@@ -0,0 +1,184 @@
+<?php
+
+namespace Drupal\media;
+
+use Drupal\Core\Entity\ContentEntityForm;
+use Drupal\Core\Form\FormStateInterface;
+
+/**
+ * Form controller for the media edit forms.
+ */
+class MediaForm extends ContentEntityForm {
+
+  /**
+   * Default settings for this media bundle.
+   *
+   * @var array
+   */
+  protected $settings;
+
+  /**
+   * The entity being used by this form.
+   *
+   * @var \Drupal\media\MediaInterface
+   */
+  protected $entity;
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function prepareEntity() {
+    parent::prepareEntity();
+
+    // Set up default values, if required.
+    if (!$this->getEntity()->isNew()) {
+      $this->entity->setOwnerId($this->currentUser()->id());
+      $this->entity->setCreatedTime($this->time->getRequestTime());
+    }
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function form(array $form, FormStateInterface $form_state) {
+    $form = parent::form($form, $form_state);
+    /** @var \Drupal\media\MediaTypeInterface $bundle_entity */
+    $bundle_entity = $this->entity->bundle->entity;
+
+    if ($this->operation == 'edit') {
+      $form['#title'] = $this->t('Edit %bundle_label @label', [
+        '%bundle_label' => $bundle_entity->label(),
+        '@label' => $this->entity->label(),
+      ]);
+    }
+
+    // Media author information for administrators.
+    if (isset($form['uid']) || isset($form['created'])) {
+      $form['author'] = [
+        '#type' => 'details',
+        '#title' => $this->t('Authoring information'),
+        '#group' => 'advanced',
+        '#attributes' => [
+          'class' => ['media-form-author'],
+        ],
+        '#weight' => 90,
+        '#optional' => TRUE,
+      ];
+    }
+
+    if (isset($form['uid'])) {
+      $form['uid']['#group'] = 'author';
+    }
+
+    if (isset($form['created'])) {
+      $form['created']['#group'] = 'author';
+    }
+
+    $form['#attached']['library'][] = 'media/media_form';
+
+    $form['#entity_builders']['update_status'] = [$this, 'updateStatus'];
+
+    return $form;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function actions(array $form, FormStateInterface $form_state) {
+    $element = parent::actions($form, $form_state);
+    $media = $this->entity;
+
+    // Add a "Publish" button.
+    $element['publish'] = $element['submit'];
+    // If the "Publish" button is clicked, we want to update the status to
+    // "published".
+    $element['publish']['#published_status'] = TRUE;
+    $element['publish']['#dropbutton'] = 'save';
+    if ($media->isNew()) {
+      $element['publish']['#value'] = $this->t('Save and publish');
+    }
+    else {
+      $element['publish']['#value'] = $media->isPublished() ? $this->t('Save and keep published') : $this->t('Save and publish');
+    }
+    $element['publish']['#weight'] = 0;
+
+    // Add a "Unpublish" button.
+    $element['unpublish'] = $element['submit'];
+    // If the "Unpublish" button is clicked, we want to update the status to
+    // "unpublished".
+    $element['unpublish']['#published_status'] = FALSE;
+    $element['unpublish']['#dropbutton'] = 'save';
+    if ($media->isNew()) {
+      $element['unpublish']['#value'] = $this->t('Save as unpublished');
+    }
+    else {
+      $element['unpublish']['#value'] = !$media->isPublished() ? $this->t('Save and keep unpublished') : $this->t('Save and unpublish');
+    }
+    $element['unpublish']['#weight'] = 10;
+
+    // If already published, the 'publish' button is primary.
+    if ($media->isPublished()) {
+      unset($element['unpublish']['#button_type']);
+    }
+    // Otherwise, the 'unpublish' button is primary and should come first.
+    else {
+      unset($element['publish']['#button_type']);
+      $element['unpublish']['#weight'] = -10;
+    }
+
+    // Remove the "Save" button.
+    $element['submit']['#access'] = FALSE;
+
+    $element['delete']['#access'] = $media->access('delete');
+    $element['delete']['#weight'] = 100;
+
+    return $element;
+  }
+
+  /**
+   * Entity builder updating the media status with the submitted value.
+   *
+   * @param string $entity_type_id
+   *   The entity type identifier.
+   * @param \Drupal\media\MediaInterface $media
+   *   The media updated with the submitted values.
+   * @param array $form
+   *   The complete form array.
+   * @param \Drupal\Core\Form\FormStateInterface $form_state
+   *   The current state of the form.
+   *
+   * @see \Drupal\media\MediaForm::form()
+   */
+  public function updateStatus($entity_type_id, MediaInterface $media, array $form, FormStateInterface $form_state) {
+    $element = $form_state->getTriggeringElement();
+    if (!empty($element['#published_status'])) {
+      $media->setPublished();
+    }
+    else {
+      $media->setUnpublished();
+    }
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function save(array $form, FormStateInterface $form_state) {
+    $saved = parent::save($form, $form_state);
+    $context = ['@type' => $this->entity->bundle(), '%label' => $this->entity->label()];
+    $logger = $this->logger('media');
+    $t_args = ['@type' => $this->entity->bundle->entity->label(), '%label' => $this->entity->label()];
+
+    if ($saved === SAVED_NEW) {
+      $logger->notice('@type: added %label.', $context);
+      drupal_set_message($this->t('@type %label has been created.', $t_args));
+    }
+    else {
+      $logger->notice('@type: updated %label.', $context);
+      drupal_set_message($this->t('@type %label has been updated.', $t_args));
+    }
+
+    $form_state->setRedirectUrl($this->entity->toUrl('canonical'));
+    return $saved;
+  }
+
+}
diff --git a/core/modules/media/src/MediaHandlerBase.php b/core/modules/media/src/MediaHandlerBase.php
new file mode 100644
index 0000000000000000000000000000000000000000..5b592f88054637cb40eb2eb277824383ce373548
--- /dev/null
+++ b/core/modules/media/src/MediaHandlerBase.php
@@ -0,0 +1,302 @@
+<?php
+
+namespace Drupal\media;
+
+use Drupal\Component\Utility\NestedArray;
+use Drupal\Core\Entity\EntityFieldManagerInterface;
+use Drupal\Core\Entity\EntityTypeManagerInterface;
+use Drupal\Core\Form\FormStateInterface;
+use Drupal\Core\Config\ConfigFactoryInterface;
+use Drupal\Core\Plugin\PluginBase;
+use Drupal\Core\Plugin\ContainerFactoryPluginInterface;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+
+/**
+ * Base implementation of media handler plugin.
+ */
+abstract class MediaHandlerBase extends PluginBase implements SourceFieldInterface, ContainerFactoryPluginInterface {
+
+  /**
+   * Plugin label.
+   *
+   * @var string
+   */
+  protected $label;
+
+  /**
+   * The entity type manager service.
+   *
+   * @var \Drupal\Core\Entity\EntityTypeManagerInterface
+   */
+  protected $entityTypeManager;
+
+  /**
+   * The entity field manager service.
+   *
+   * @var \Drupal\Core\Entity\EntityFieldManagerInterface
+   */
+  protected $entityFieldManager;
+
+  /**
+   * The config factory service.
+   *
+   * @var \Drupal\Core\Config\ConfigFactoryInterface
+   */
+  protected $configFactory;
+
+  /**
+   * Constructs a new class instance.
+   *
+   * @param array $configuration
+   *   A configuration array containing information about the plugin instance.
+   * @param string $plugin_id
+   *   The plugin_id for the plugin instance.
+   * @param mixed $plugin_definition
+   *   The plugin implementation definition.
+   * @param \Drupal\Core\Entity\EntityTypeManagerInterface $entity_type_manager
+   *   Entity type manager service.
+   * @param \Drupal\Core\Entity\EntityFieldManagerInterface $entity_field_manager
+   *   Entity field manager service.
+   * @param \Drupal\Core\Config\ConfigFactoryInterface $config_factory
+   *   The config factory service.
+   */
+  public function __construct(array $configuration, $plugin_id, $plugin_definition, EntityTypeManagerInterface $entity_type_manager, EntityFieldManagerInterface $entity_field_manager, ConfigFactoryInterface $config_factory) {
+    parent::__construct($configuration, $plugin_id, $plugin_definition);
+    $this->entityTypeManager = $entity_type_manager;
+    $this->entityFieldManager = $entity_field_manager;
+    $this->configFactory = $config_factory;
+    $this->setConfiguration($configuration);
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
+    return new static(
+      $configuration,
+      $plugin_id,
+      $plugin_definition,
+      $container->get('entity_type.manager'),
+      $container->get('entity_field.manager'),
+      $container->get('config.factory')
+    );
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function setConfiguration(array $configuration) {
+    $this->configuration = NestedArray::mergeDeep(
+      $this->defaultConfiguration(),
+      $configuration
+    );
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getConfiguration() {
+    return $this->configuration;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function defaultConfiguration() {
+    return [
+      'source_field' => NULL,
+    ];
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getDefaultThumbnail() {
+    return $this->configFactory->get('media.settings')->get('icon_base') . '/generic.png';
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getLabel() {
+    return $this->label;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function attachConstraints(MediaInterface $media) {
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function calculateDependencies() {
+    $dependencies = [];
+    if ($this->configuration['source_field']) {
+      $dependencies['config'][] = 'field.storage.' . $this->configuration['source_field'];
+    }
+    return $dependencies;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function buildConfigurationForm(array $form, FormStateInterface $form_state) {
+    $options = [];
+
+    foreach ($this->entityFieldManager->getFieldStorageDefinitions('media') as $field_name => $field) {
+      $allowed_type = in_array($field->getType(), $this->pluginDefinition['allowed_field_types'], TRUE);
+      if ($allowed_type && !$field->isBaseField()) {
+        $options[$field_name] = $field->getLabel();
+      }
+    }
+
+    // If there are existing fields to choose from, allow the user to reuse one.
+    if ($options) {
+      $form['source_field'] = [
+        '#type' => 'select',
+        '#title' => $this->t('Field with source information'),
+        '#default_value' => $this->configuration['source_field'],
+        '#empty_option' => $this->t('- Create -'),
+        '#options' => $options,
+        '#description' => $this->t('The field on media items of this type that will store the source information.'),
+      ];
+    }
+    return $form;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function validateConfigurationForm(array &$form, FormStateInterface $form_state) {
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function submitConfigurationForm(array &$form, FormStateInterface $form_state) {
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getDefaultName(MediaInterface $media) {
+    return 'media:' . $media->bundle() . ':' . $media->uuid();
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getSourceField(MediaTypeInterface $type, $retry = TRUE) {
+    // If we don't know the name of the source field, we definitely need to
+    // create it.
+    if (empty($this->configuration['source_field'])) {
+      return $this->createSourceField($type);
+    }
+    // Even if we do know the name of the source field, there is no guarantee
+    // that it already exists. So check for the field and create it if needed.
+    $field = $this->configuration['source_field'];
+    $fields = $this->entityFieldManager->getFieldDefinitions('media', $type->id());
+    return isset($fields[$field]) ? $fields[$field] : $this->createSourceField($type);
+  }
+
+  /**
+   * Returns the source field storage definition.
+   *
+   * @return \Drupal\Core\Field\FieldStorageDefinitionInterface
+   *   The field storage definition. Will be unsaved if new.
+   */
+  protected function getSourceFieldStorage() {
+    // If we don't know the name of the source field, we definitely need to
+    // create its storage.
+    if (empty($this->configuration['source_field'])) {
+      return $this->createSourceFieldStorage();
+    }
+    // Even if we do know the name of the source field, we cannot guarantee that
+    // its storage exists. So check for the storage and create it if needed.
+    $field = $this->configuration['source_field'];
+    $fields = $this->entityFieldManager->getFieldStorageDefinitions('media');
+    return isset($fields[$field]) ? $fields[$field] : $this->createSourceFieldStorage();
+  }
+
+  /**
+   * Creates the source field storage definition.
+   *
+   * By default, the first field type listed in the plugin definition's
+   * allowed_field_types array will be the generated field's type.
+   *
+   * @return \Drupal\field\FieldStorageConfigInterface
+   *   The unsaved field storage definition.
+   */
+  protected function createSourceFieldStorage() {
+    return $this->entityTypeManager
+      ->getStorage('field_storage_config')
+      ->create([
+        'entity_type' => 'media',
+        'field_name' => $this->getSourceFieldName(),
+        'type' => reset($this->pluginDefinition['allowed_field_types']),
+      ]);
+  }
+
+  /**
+   * Creates the source field definition for a type.
+   *
+   * @param \Drupal\media\MediaTypeInterface $type
+   *   The media type.
+   *
+   * @return \Drupal\field\FieldConfigInterface
+   *   The unsaved field definition. The field storage definition, if new,
+   *   should also be unsaved.
+   */
+  protected function createSourceField(MediaTypeInterface $type) {
+    return $this->entityTypeManager
+      ->getStorage('field_config')
+      ->create([
+        'field_storage' => $this->getSourceFieldStorage(),
+        'bundle' => $type->id(),
+      ]);
+  }
+
+  /**
+   * Determine the name of the source field.
+   *
+   * @return string
+   *   The source field name. If one is already stored in configuration, it is
+   *   returned. Otherwise, a new, unused one is generated.
+   */
+  protected function getSourceFieldName() {
+    if ($this->configuration['source_field']) {
+      return $this->configuration['source_field'];
+    }
+
+    $base_id = 'field_media_' . $this->getPluginId();
+    $tries = 0;
+    $storage = $this->entityTypeManager->getStorage('field_storage_config');
+
+    // Iterate at least once, until no field with the generated ID is found.
+    do {
+      $id = $base_id;
+      // If we've tried before, increment and append the suffix.
+      if ($tries) {
+        $id .= '_' . $tries;
+      }
+      $field = $storage->load('media.' . $id);
+      $tries++;
+    } while ($field);
+
+    return $id;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function mapFieldValue(MediaInterface $media, $source_field, $destination_field) {
+    // Only save value in entity field if empty. Do not overwrite existing
+    // data.
+    if ($media->hasField($destination_field) && $media->get($destination_field)->isEmpty() && ($value = $this->getField($media, $source_field))) {
+      $media->set($destination_field, $value);
+    }
+  }
+
+}
diff --git a/core/modules/media/src/MediaHandlerInterface.php b/core/modules/media/src/MediaHandlerInterface.php
new file mode 100644
index 0000000000000000000000000000000000000000..2c46ac1b4d018145948823165549ee88b5f7bb57
--- /dev/null
+++ b/core/modules/media/src/MediaHandlerInterface.php
@@ -0,0 +1,110 @@
+<?php
+
+namespace Drupal\media;
+
+use Drupal\Component\Plugin\ConfigurablePluginInterface;
+use Drupal\Component\Plugin\PluginInspectionInterface;
+use Drupal\Core\Plugin\PluginFormInterface;
+
+/**
+ * Defines the interface for media handler plugins.
+ *
+ * @see \Drupal\media\Annotation\MediaHandler
+ * @see \Drupal\media\MediaHandlerBase
+ * @see \Drupal\media\MediaHandlerManager
+ * @see plugin_api
+ */
+interface MediaHandlerInterface extends PluginInspectionInterface, ConfigurablePluginInterface, PluginFormInterface {
+
+  /**
+   * Returns the display label of the media handler plugin.
+   *
+   * @return string
+   *   The display label of the media handler plugin.
+   */
+  public function getLabel();
+
+  /**
+   * Gets list of fields provided by this plugin.
+   *
+   * @return array
+   *   Associative array with field names as keys and arrays as values. Each
+   *   of those arrays should have the following values:
+   *   - label: human-readable label of the field
+   *   - field_type: (optional) entity field type that the field should be
+   *     mapped to by default. "string" will be assumed if omitted.
+   */
+  public function getProvidedFields();
+
+  /**
+   * Gets a media-related field/value.
+   *
+   * @param \Drupal\media\MediaInterface $media
+   *   The media entity.
+   * @param string $name
+   *   Name of field to fetch.
+   *
+   * @return mixed|false
+   *   Field value or FALSE if data unavailable.
+   */
+  public function getField(MediaInterface $media, $name);
+
+  /**
+   * Attaches handler-specific constraints to media.
+   *
+   * @param \Drupal\media\MediaInterface $media
+   *   The media entity.
+   */
+  public function attachConstraints(MediaInterface $media);
+
+  /**
+   * Gets thumbnail image.
+   *
+   * Media handler plugin is responsible for returning URI of the generic
+   * thumbnail if no other is available. This function should always return a
+   * valid URI.
+   *
+   * @param \Drupal\media\MediaInterface $media
+   *   The media entity.
+   *
+   * @return string
+   *   URI of the thumbnail.
+   */
+  public function getThumbnail(MediaInterface $media);
+
+  /**
+   * Gets the default thumbnail image.
+   *
+   * @return string
+   *   URI of the default thumbnail image.
+   */
+  public function getDefaultThumbnail();
+
+  /**
+   * Provide a default name for the media.
+   *
+   * Plugins defining media bundles are suggested to override this method and
+   * provide a default name, to be used when there is no user-defined label
+   * available.
+   *
+   * @param \Drupal\media\MediaInterface $media
+   *   The media entity.
+   *
+   * @return string
+   *   The string that should be used as default media name.
+   */
+  public function getDefaultName(MediaInterface $media);
+
+  /**
+   * Maps metadata field to the entity field.
+   *
+   * @param \Drupal\media\MediaInterface $media
+   *   The media entity.
+   * @param string $source_field
+   *   Name of the source metadata field.
+   * @param string $destination_field
+   *   Name of the destination entity field.
+   */
+  public function mapFieldValue(MediaInterface $media, $source_field, $destination_field);
+
+}
diff --git a/core/modules/media/src/MediaHandlerManager.php b/core/modules/media/src/MediaHandlerManager.php
new file mode 100644
index 0000000000000000000000000000000000000000..045cf0371bd845e604c85f74a221d74ddd9ed331
--- /dev/null
+++ b/core/modules/media/src/MediaHandlerManager.php
@@ -0,0 +1,33 @@
+<?php
+
+namespace Drupal\media;
+
+use Drupal\Core\Cache\CacheBackendInterface;
+use Drupal\Core\Extension\ModuleHandlerInterface;
+use Drupal\Core\Plugin\DefaultPluginManager;
+use Drupal\media\Annotation\MediaHandler;
+
+/**
+ * Manages media handler plugins.
+ */
+class MediaHandlerManager extends DefaultPluginManager {
+
+  /**
+   * Constructs a new MediaHandlerManager.
+   *
+   * @param \Traversable $namespaces
+   *   An object that implements \Traversable which contains the root paths
+   *   keyed by the corresponding namespace to look for plugin implementations.
+   * @param \Drupal\Core\Cache\CacheBackendInterface $cache_backend
+   *   Cache backend instance to use.
+   * @param \Drupal\Core\Extension\ModuleHandlerInterface $module_handler
+   *   The module handler.
+   */
+  public function __construct(\Traversable $namespaces, CacheBackendInterface $cache_backend, ModuleHandlerInterface $module_handler) {
+    parent::__construct('Plugin/media/Handler', $namespaces, $module_handler, MediaHandlerInterface::class, MediaHandler::class);
+
+    $this->alterInfo('media_handler_info');
+    $this->setCacheBackend($cache_backend, 'media_handler_plugins');
+  }
+
+}
diff --git a/core/modules/media/src/MediaInterface.php b/core/modules/media/src/MediaInterface.php
new file mode 100644
index 0000000000000000000000000000000000000000..91ec0534d62db9c16011ee7a252a187d0f80deed
--- /dev/null
+++ b/core/modules/media/src/MediaInterface.php
@@ -0,0 +1,43 @@
+<?php
+
+namespace Drupal\media;
+
+use Drupal\Core\Entity\EntityChangedInterface;
+use Drupal\Core\Entity\ContentEntityInterface;
+use Drupal\Core\Entity\EntityPublishedInterface;
+use Drupal\Core\Entity\RevisionLogInterface;
+use Drupal\user\EntityOwnerInterface;
+
+/**
+ * Provides an interface defining a media entity.
+ */
+interface MediaInterface extends ContentEntityInterface, EntityChangedInterface, RevisionLogInterface, EntityOwnerInterface, EntityPublishedInterface {
+
+  /**
+   * Returns the media creation timestamp.
+   *
+   * @return int
+   *   Creation timestamp of the media.
+   */
+  public function getCreatedTime();
+
+  /**
+   * Sets the media creation timestamp.
+   *
+   * @param int $timestamp
+   *   The media creation timestamp.
+   *
+   * @return \Drupal\media\MediaInterface
+   *   The called media entity.
+   */
+  public function setCreatedTime($timestamp);
+
+  /**
+   * Returns the media handler plugin.
+   *
+   * @return \Drupal\media\MediaHandlerInterface
+   *   The handler plugin.
+   */
+  public function getHandler();
+
+}
diff --git a/core/modules/media/src/MediaThumbnailHandler.php b/core/modules/media/src/MediaThumbnailHandler.php
new file mode 100644
index 0000000000000000000000000000000000000000..ea5f9790c7b5e16f8ed03d4e3d40408a4b379143
--- /dev/null
+++ b/core/modules/media/src/MediaThumbnailHandler.php
@@ -0,0 +1,70 @@
+<?php
+
+namespace Drupal\media;
+
+use Drupal\Core\Entity\EntityTypeManagerInterface;
+use Drupal\Core\StringTranslation\StringTranslationTrait;
+use Drupal\Core\StringTranslation\TranslationInterface;
+
+/**
+ * Provides a service for handling media thumbnails.
+ */
+class MediaThumbnailHandler implements MediaThumbnailHandlerInterface {
+
+  use StringTranslationTrait;
+
+  /**
+   * The file entity storage handler.
+   *
+   * @var \Drupal\file\FileStorageInterface
+   */
+  protected $fileStorage;
+
+  /**
+   * Constructs a new MediaThumbnailHandler.
+   *
+   * @param \Drupal\Core\Entity\EntityTypeManagerInterface $entity_type_manager
+   *   The entity type manager service.
+   * @param \Drupal\Core\StringTranslation\TranslationInterface $translation
+   *   The string translation service.
+   */
+  public function __construct(EntityTypeManagerInterface $entity_type_manager, TranslationInterface $translation) {
+    $this->fileStorage = $entity_type_manager->getStorage('file');
+    $this->stringTranslation = $translation;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function setThumbnail(MediaInterface $media) {
+    // If thumbnail fetching should be queued then temporary use default
+    // thumbnail or fetch it immediately otherwise.
+    if ($media->bundle->entity->getQueueThumbnailDownloads() && $media->isNew()) {
+      $thumbnail_uri = $media->getHandler()->getDefaultThumbnail();
+    }
+    else {
+      $thumbnail_uri = $media->getHandler()->getThumbnail($media);
+    }
+    $existing = $this->fileStorage->getQuery()
+      ->condition('uri', $thumbnail_uri)
+      ->execute();
+
+    if ($existing) {
+      $media->thumbnail->target_id = reset($existing);
+    }
+    else {
+      /** @var \Drupal\file\FileInterface $file */
+      $file = $this->fileStorage->create(['uri' => $thumbnail_uri]);
+      if ($owner = $media->getOwner()) {
+        $file->setOwner($owner);
+      }
+      $file->setPermanent();
+      $file->save();
+      $media->thumbnail->target_id = $file->id();
+    }
+
+    $media->thumbnail->alt = $this->t('Thumbnail');
+    $media->thumbnail->title = $media->label();
+  }
+
+}
diff --git a/core/modules/media/src/MediaThumbnailHandlerInterface.php b/core/modules/media/src/MediaThumbnailHandlerInterface.php
new file mode 100644
index 0000000000000000000000000000000000000000..67d976c8997602873aa470a6157ac29a1a1e6c95
--- /dev/null
+++ b/core/modules/media/src/MediaThumbnailHandlerInterface.php
@@ -0,0 +1,18 @@
+<?php
+
+namespace Drupal\media;
+
+/**
+ * Provides an interface defining a media thumbnail service.
+ */
+interface MediaThumbnailHandlerInterface {
+
+  /**
+   * Sets the media thumbnail.
+   *
+   * @param \Drupal\media\MediaInterface $media
+   *   The Media entity.
+   */
+  public function setThumbnail(MediaInterface $media);
+
+}
diff --git a/core/modules/media/src/MediaTypeForm.php b/core/modules/media/src/MediaTypeForm.php
new file mode 100644
index 0000000000000000000000000000000000000000..98813cfae222a50b3ca592c125d82ef3c3eaf7f8
--- /dev/null
+++ b/core/modules/media/src/MediaTypeForm.php
@@ -0,0 +1,368 @@
+<?php
+
+namespace Drupal\media;
+
+use Drupal\Core\Ajax\AjaxResponse;
+use Drupal\Core\Ajax\ReplaceCommand;
+use Drupal\Core\Entity\EntityFieldManagerInterface;
+use Drupal\Core\Entity\EntityForm;
+use Drupal\Core\Entity\EntityInterface;
+use Drupal\Core\Field\BaseFieldDefinition;
+use Drupal\Core\Form\FormStateInterface;
+use Drupal\media\Entity\MediaType;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+
+/**
+ * Form controller for media type forms.
+ */
+class MediaTypeForm extends EntityForm {
+
+  /**
+   * The instantiated plugin instances that have configuration forms.
+   *
+   * @var \Drupal\Core\Plugin\PluginFormInterface[]
+   */
+  protected $configurableInstances = [];
+
+  /**
+   * Media handler plugin manager.
+   *
+   * @var \Drupal\media\MediaHandlerManager
+   */
+  protected $handlerManager;
+
+  /**
+   * Entity field manager service.
+   *
+   * @var \Drupal\Core\Entity\EntityFieldManagerInterface
+   */
+  protected $entityFieldManager;
+
+  /**
+   * The entity being created or modified.
+   *
+   * @var \Drupal\media\MediaTypeInterface
+   */
+  protected $entity;
+
+  /**
+   * Constructs a new class instance.
+   *
+   * @param \Drupal\media\MediaHandlerManager $handler_manager
+   *   Media handler plugin manager.
+   * @param \Drupal\Core\Entity\EntityFieldManagerInterface $entity_field_manager
+   *   Entity field manager service.
+   */
+  public function __construct(MediaHandlerManager $handler_manager, EntityFieldManagerInterface $entity_field_manager) {
+    $this->handlerManager = $handler_manager;
+    $this->entityFieldManager = $entity_field_manager;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function create(ContainerInterface $container) {
+    return new static(
+      $container->get('plugin.manager.media.handler'),
+      $container->get('entity_field.manager')
+    );
+  }
+
+  /**
+   * Ajax callback triggered by the type provider select element.
+   */
+  public function ajaxHandlerData(array $form, FormStateInterface $form_state) {
+    $response = new AjaxResponse();
+    $response->addCommand(new ReplaceCommand('#handler-dependent', $form['handler_dependent']));
+    return $response;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function form(array $form, FormStateInterface $form_state) {
+    $form = parent::form($form, $form_state);
+
+    $bundle = $this->entity;
+    $form_state->set('bundle', $bundle->id());
+
+    /** @var \Drupal\media\MediaHandlerInterface $handler */
+    $handler = NULL;
+    if ($bundle->get('handler')) {
+      // Handler is not set when the entity is initially created.
+      $handler = $bundle->getHandler();
+      $this->configurableInstances[$handler]['plugin_config'] = empty($configuration[$handler]) ? [] : $configuration[$handler];
+    }
+
+    if ($this->operation == 'add') {
+      $form['#title'] = $this->t('Add media type');
+    }
+
+    $form['label'] = [
+      '#title' => $this->t('Name'),
+      '#type' => 'textfield',
+      '#default_value' => $bundle->label(),
+      '#description' => $this->t('The human-readable name of this media type.'),
+      '#required' => TRUE,
+      '#size' => 30,
+    ];
+
+    $form['id'] = [
+      '#type' => 'machine_name',
+      '#default_value' => $bundle->id(),
+      '#maxlength' => 32,
+      '#disabled' => !$bundle->isNew(),
+      '#machine_name' => [
+        'exists' => [MediaType::class, 'load'],
+      ],
+      '#description' => $this->t('A unique machine-readable name for this media type.'),
+    ];
+
+    $form['description'] = [
+      '#title' => $this->t('Description'),
+      '#type' => 'textarea',
+      '#default_value' => $bundle->getDescription(),
+      '#description' => $this->t('Describe this media type. The text will be displayed on the <em>Add new media</em> page.'),
+    ];
+
+    $plugins = $this->handlerManager->getDefinitions();
+    $options = [];
+    foreach ($plugins as $plugin_id => $definition) {
+      $options[$plugin_id] = $definition['label'];
+    }
+
+    $form['handler_dependent'] = [
+      '#type' => 'container',
+      '#attributes' => ['id' => 'handler-dependent'],
+    ];
+
+    $form['handler_dependent']['handler'] = [
+      '#type' => 'select',
+      '#title' => $this->t('Handler'),
+      '#default_value' => $handler ? $handler->getPluginId() : NULL,
+      '#options' => $options,
+      '#description' => $this->t('Media handler that is responsible for additional logic related to this media type.'),
+      '#ajax' => ['callback' => '::ajaxHandlerData'],
+      '#required' => TRUE,
+    ];
+
+    if (!$handler) {
+      $form['type']['#empty_option'] = $this->t('- Select handler -');
+    }
+
+    if ($handler) {
+      // Media handler plugin configuration.
+      $form['handler_dependent']['handler_configuration'] = [
+        '#type' => 'fieldset',
+        '#title' => $this->t('Handler configuration'),
+        '#tree' => TRUE,
+      ];
+
+      $handler_configuration = empty($this->configurableInstances[$handler->getPluginId()]['plugin_config']) ? $bundle->getHandlerConfiguration() : $this->configurableInstances[$plugin->getPluginId()]['plugin_config'];
+      /** @var \Drupal\media\MediaHandlerBase $instance */
+      $instance = $this->handlerManager->createInstance($handler->getPluginId(), $handler_configuration);
+      // Store the configuration for validate and submit handlers.
+      $this->configurableInstances[$handler->getPluginId()]['plugin_config'] = $handler_configuration;
+      $form['handler_dependent']['handler_configuration'][$handler->getPluginId()] = $instance->buildConfigurationForm(['#type' => 'container'], $form_state);
+    }
+
+    // Field mapping configuration.
+    $form['handler_dependent']['field_mapping'] = [
+      '#type' => 'fieldset',
+      '#title' => $this->t('Field mapping'),
+      '#tree' => TRUE,
+      'description' => [
+        '#markup' => '<p>' . $this->t('Media handlers can provide metadata fields such as title, caption, size information, credits, etc. Media can automatically save this metadata information to entity fields, which can be configured below. Information will only be mapped if the entity field is empty.') . '</p>',
+      ],
+    ];
+
+    if (empty($handler) || empty($handler->getProvidedFields())) {
+      $form['handler_dependent']['field_mapping']['#access'] = FALSE;
+    }
+    else {
+      $options = ['_none' => $this->t('- Skip field -')];
+      foreach ($this->entityFieldManager->getFieldDefinitions('media', $bundle->id()) as $field_name => $field) {
+        if (!($field instanceof BaseFieldDefinition) || $field_name == 'name') {
+          $options[$field_name] = $field->getLabel();
+        }
+      }
+
+      $field_map = $bundle->getFieldMap();
+      foreach ($handler->getProvidedFields() as $field_name => $field_definition) {
+        // This is a BC layer. In the past this function returned string and now
+        // it returns arrays.
+        if (!is_array($field_definition)) {
+          $field_definition = ['label' => $field_definition];
+        }
+
+        $form['handler_dependent']['field_mapping'][$field_name] = [
+          '#type' => 'select',
+          '#title' => $field_definition['label'],
+          '#options' => $options,
+          '#default_value' => isset($field_map[$field_name]) ? $field_map[$field_name] : '_none',
+        ];
+      }
+    }
+
+    $form['additional_settings'] = [
+      '#type' => 'vertical_tabs',
+      '#attached' => [
+        'library' => ['media/media_type_form'],
+      ],
+    ];
+
+    $form['workflow'] = [
+      '#type' => 'details',
+      '#title' => $this->t('Publishing options'),
+      '#group' => 'additional_settings',
+    ];
+
+    $workflow_options = [
+      'status' => $bundle->getStatus(),
+      'new_revision' => $bundle->shouldCreateNewRevision(),
+      'queue_thumbnail_downloads' => $bundle->getQueueThumbnailDownloads(),
+    ];
+    // Prepare workflow options to be used for 'checkboxes' form element.
+    $keys = array_keys(array_filter($workflow_options));
+    $workflow_options = array_combine($keys, $keys);
+    $form['workflow']['options'] = [
+      '#type' => 'checkboxes',
+      '#title' => $this->t('Default options'),
+      '#default_value' => $workflow_options,
+      '#options' => [
+        'status' => $this->t('Published'),
+        'new_revision' => $this->t('Create new revision'),
+        'queue_thumbnail_downloads' => $this->t('Queue thumbnail downloads'),
+      ],
+    ];
+
+    $form['workflow']['options']['status']['#description'] = $this->t('Media will be automatically published when created.');
+    $form['workflow']['options']['new_revision']['#description'] = $this->t('Automatically create new revisions. Users with the Administer media permission will be able to override this option.');
+    $form['workflow']['options']['queue_thumbnail_downloads']['#description'] = $this->t('Download thumbnails via a queue.');
+
+    if ($this->moduleHandler->moduleExists('language')) {
+      $form['language'] = [
+        '#type' => 'details',
+        '#title' => $this->t('Language settings'),
+        '#group' => 'additional_settings',
+      ];
+
+      $language_configuration = call_user_func(
+        ['\Drupal\language\Entity\ContentLanguageSettings', 'loadByEntityTypeBundle'],
+        'media',
+        $bundle->id()
+      );
+
+      $form['language']['language_configuration'] = [
+        '#type' => 'language_configuration',
+        '#entity_information' => [
+          'entity_type' => 'media',
+          'bundle' => $bundle->id(),
+        ],
+        '#default_value' => $language_configuration,
+      ];
+    }
+
+    return $form;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function validateForm(array &$form, FormStateInterface $form_state) {
+    parent::validateForm($form, $form_state);
+
+    // Let the selected plugin validate its settings.
+    $plugin = $this->entity->getHandler()->getPluginId();
+    $plugin_configuration = !empty($this->configurableInstances[$plugin]['plugin_config']) ? $this->configurableInstances[$plugin]['plugin_config'] : [];
+    $instance = $this->handlerManager->createInstance($plugin, $plugin_configuration);
+    $instance->validateConfigurationForm($form, $form_state);
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function submitForm(array &$form, FormStateInterface $form_state) {
+    parent::submitForm($form, $form_state);
+
+    $this->entity->setQueueThumbnailDownloads((bool) $form_state->getValue(['options', 'queue_thumbnail_downloads']));
+    $this->entity->setStatus((bool) $form_state->getValue(['options', 'status']));
+
+    $this->entity->setNewRevision((bool) $form_state->getValue(['options', 'new_revision']));
+
+    // Let the selected plugin save its settings.
+    $plugin = $this->entity->getHandler()->getPluginId();
+    $plugin_configuration = !empty($this->configurableInstances[$plugin]['plugin_config']) ? $this->configurableInstances[$plugin]['plugin_config'] : [];
+    $instance = $this->handlerManager->createInstance($plugin, $plugin_configuration);
+    $instance->submitConfigurationForm($form, $form_state);
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function actions(array $form, FormStateInterface $form_state) {
+    $actions = parent::actions($form, $form_state);
+    $actions['submit']['#value'] = $this->t('Save');
+    $actions['delete']['#value'] = $this->t('Delete');
+    $actions['delete']['#access'] = $this->entity->access('delete');
+    return $actions;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function copyFormValuesToEntity(EntityInterface $entity, array $form, FormStateInterface $form_state) {
+    $configuration = $form_state->getValue('handler_configuration');
+
+    // Store previous plugin config.
+    $plugin = NULL;
+    if ($entity->get('handler')) {
+      // Handler is not set when the entity is initially created.
+      $plugin = $entity->getHandler()->getPluginId();
+      $this->configurableInstances[$plugin]['plugin_config'] = empty($configuration[$plugin]) ? [] : $configuration[$plugin];
+    }
+
+    /** @var \Drupal\media\MediaInterface $entity */
+    parent::copyFormValuesToEntity($entity, $form, $form_state);
+
+    // Use type configuration for the plugin that was chosen.
+    $plugin = $entity->getHandler()->getPluginId();
+    $plugin_configuration = empty($configuration[$plugin]) ? [] : $configuration[$plugin];
+    $entity->set('handler_configuration', $plugin_configuration);
+
+    // Save field mapping.
+    $entity->set('field_map', array_filter(
+      $form_state->getValue('field_mapping', []),
+      function ($item) { return $item != '_none'; }
+    ));
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function save(array $form, FormStateInterface $form_state) {
+    $status = parent::save($form, $form_state);
+    $bundle = $this->entity;
+
+    $t_args = ['%name' => $bundle->label()];
+    if ($status == SAVED_UPDATED) {
+      drupal_set_message($this->t('The media type %name has been updated.', $t_args));
+    }
+    elseif ($status == SAVED_NEW) {
+      drupal_set_message($this->t('The media type %name has been added.', $t_args));
+      $this->logger('media')->notice('Added type %name.', $t_args);
+    }
+
+    // Override the "status" base field default value, for this bundle.
+    $fields = $this->entityFieldManager->getFieldDefinitions('media', $bundle->id());
+    /** @var \Drupal\media\MediaInterface $media */
+    $media = $this->entityTypeManager->getStorage('media')->create(['bundle' => $bundle->id()]);
+    $value = (bool) $form_state->getValue(['options', 'status']);
+    if ($media->status->value != $value) {
+      $fields['status']->getConfig($bundle->id())->setDefaultValue($value)->save();
+    }
+
+    $form_state->setRedirectUrl($bundle->toUrl('collection'));
+  }
+
+}
diff --git a/core/modules/media/src/MediaTypeInterface.php b/core/modules/media/src/MediaTypeInterface.php
new file mode 100644
index 0000000000000000000000000000000000000000..cd6fd605ef2ba085f40bde2b6c97a3e53a67f1d4
--- /dev/null
+++ b/core/modules/media/src/MediaTypeInterface.php
@@ -0,0 +1,89 @@
+<?php
+
+namespace Drupal\media;
+
+use Drupal\Core\Config\Entity\ConfigEntityInterface;
+use Drupal\Core\Entity\EntityDescriptionInterface;
+use Drupal\Core\Entity\RevisionableEntityBundleInterface;
+
+/**
+ * Provides an interface defining a media bundle entity.
+ */
+interface MediaTypeInterface extends ConfigEntityInterface, EntityDescriptionInterface, RevisionableEntityBundleInterface {
+
+  /**
+   * Returns the label.
+   *
+   * @param \Drupal\media\MediaInterface $media
+   *   The media entity.
+   *
+   * @return string|bool
+   *   Returns the label of the bundle that entity belongs to.
+   */
+  public static function getLabel(MediaInterface $media);
+
+  /**
+   * Returns whether thumbnail downloads are queued.
+   *
+   * @return bool
+   *   TRUE if thumbnails are queued for download later, FALSE if they should be
+   *   downloaded now.
+   */
+  public function getQueueThumbnailDownloads();
+
+  /**
+   * Sets a flag to indicate that thumbnails should be downloaded via a queue.
+   *
+   * @param bool $queue_thumbnail_downloads
+   *   The queue downloads flag.
+   *
+   * @return $this
+   */
+  public function setQueueThumbnailDownloads($queue_thumbnail_downloads);
+
+  /**
+   * Returns the media handler plugin.
+   *
+   * @return \Drupal\media\MediaHandlerInterface
+   *   The handler plugin.
+   */
+  public function getHandler();
+
+  /**
+   * Returns the media handler plugin configuration.
+   *
+   * @return array
+   *   The handler configuration.
+   */
+  public function getHandlerConfiguration();
+
+  /**
+   * Sets the media handler plugin configuration.
+   *
+   * @param array $configuration
+   *   The handler configuration.
+   *
+   * @return $this
+   */
+  public function setHandlerConfiguration(array $configuration);
+
+  /**
+   * Sets whether new revisions should be created by default.
+   *
+   * @param bool $new_revision
+   *   TRUE if media items of this type should create new revisions by default.
+   *
+   * @return $this
+   */
+  public function setNewRevision($new_revision);
+
+  /**
+   * Returns the metadata field map.
+   *
+   * @return array
+   *   Field mapping array with fields provided by the type plugin as keys and
+   *   Drupal Entity fields as values.
+   */
+  public function getFieldMap();
+
+}
diff --git a/core/modules/media/src/MediaTypeListBuilder.php b/core/modules/media/src/MediaTypeListBuilder.php
new file mode 100644
index 0000000000000000000000000000000000000000..c0c849090c843e364f38e579db2726e753894571
--- /dev/null
+++ b/core/modules/media/src/MediaTypeListBuilder.php
@@ -0,0 +1,51 @@
+<?php
+
+namespace Drupal\media;
+
+use Drupal\Core\Config\Entity\ConfigEntityListBuilder;
+use Drupal\Core\Entity\EntityHandlerInterface;
+use Drupal\Core\Entity\EntityInterface;
+use Drupal\Component\Utility\Xss;
+use Drupal\Core\Url;
+
+/**
+ * Provides a listing of media types.
+ */
+class MediaTypeListBuilder extends ConfigEntityListBuilder implements EntityHandlerInterface {
+
+  /**
+   * {@inheritdoc}
+   */
+  public function buildHeader() {
+    $header['title'] = $this->t('Name');
+    $header['description'] = [
+      'data' => $this->t('Description'),
+      'class' => [RESPONSIVE_PRIORITY_MEDIUM],
+    ];
+    return $header + parent::buildHeader();
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function buildRow(EntityInterface $entity) {
+    $row['title'] = [
+      'data' => $entity->label(),
+      'class' => ['menu-label'],
+    ];
+    $row['description']['data'] = ['#markup' => Xss::filterAdmin($entity->getDescription())];
+    return $row + parent::buildRow($entity);
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function render() {
+    $build = parent::render();
+    $build['table']['#empty'] = $this->t('No media types available. <a href="@link">Add media type</a>.', [
+      '@link' => Url::fromRoute('entity.media_type.add_form')->toString(),
+    ]);
+    return $build;
+  }
+
+}
diff --git a/core/modules/media/src/MediaViewsData.php b/core/modules/media/src/MediaViewsData.php
new file mode 100644
index 0000000000000000000000000000000000000000..f1868718d37844f143c48157a2c5237d7529ecf6
--- /dev/null
+++ b/core/modules/media/src/MediaViewsData.php
@@ -0,0 +1,24 @@
+<?php
+
+namespace Drupal\media;
+
+use Drupal\views\EntityViewsData;
+
+/**
+ * Provides the views data for the media entity type.
+ */
+class MediaViewsData extends EntityViewsData {
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getViewsData() {
+    $data = parent::getViewsData();
+
+    $data['media_field_data']['table']['wizard_id'] = 'media';
+    $data['media_field_revision']['table']['wizard_id'] = 'media_revision';
+
+    return $data;
+  }
+
+}
diff --git a/core/modules/media/src/Plugin/Action/DeleteMedia.php b/core/modules/media/src/Plugin/Action/DeleteMedia.php
new file mode 100644
index 0000000000000000000000000000000000000000..f9e6ed262aba75847e71bce50f1bdb93c318ec34
--- /dev/null
+++ b/core/modules/media/src/Plugin/Action/DeleteMedia.php
@@ -0,0 +1,98 @@
+<?php
+
+namespace Drupal\media\Plugin\Action;
+
+use Drupal\Core\Action\ActionBase;
+use Drupal\Core\Plugin\ContainerFactoryPluginInterface;
+use Drupal\Core\Session\AccountInterface;
+use Drupal\user\PrivateTempStoreFactory;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+
+/**
+ * Redirects to a media deletion form.
+ *
+ * @Action(
+ *   id = "media_delete_action",
+ *   label = @Translation("Delete media"),
+ *   type = "media",
+ *   confirm_form_route_name = "entity.media.multiple_delete_confirm",
+ * )
+ */
+class DeleteMedia extends ActionBase implements ContainerFactoryPluginInterface {
+
+  /**
+   * The tempstore object.
+   *
+   * @var \Drupal\user\SharedTempStore
+   */
+  protected $tempStore;
+
+  /**
+   * The current user.
+   *
+   * @var \Drupal\Core\Session\AccountInterface
+   */
+  protected $currentUser;
+
+  /**
+   * Constructs a new DeleteMedia object.
+   *
+   * @param array $configuration
+   *   A configuration array containing information about the plugin instance.
+   * @param string $plugin_id
+   *   The plugin ID for the plugin instance.
+   * @param mixed $plugin_definition
+   *   The plugin implementation definition.
+   * @param \Drupal\user\PrivateTempStoreFactory $temp_store_factory
+   *   The tempstore factory.
+   * @param \Drupal\Core\Session\AccountInterface $current_user
+   *   Current user.
+   */
+  public function __construct(array $configuration, $plugin_id, $plugin_definition, PrivateTempStoreFactory $temp_store_factory, AccountInterface $current_user) {
+    parent::__construct($configuration, $plugin_id, $plugin_definition);
+    $this->currentUser = $current_user;
+    $this->tempStore = $temp_store_factory->get('media_multiple_delete_confirm');
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
+    return new static(
+      $configuration,
+      $plugin_id,
+      $plugin_definition,
+      $container->get('user.private_tempstore'),
+      $container->get('current_user')
+    );
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function executeMultiple(array $entities) {
+    $info = [];
+    /** @var \Drupal\media\MediaInterface $media */
+    foreach ($entities as $media) {
+      $langcode = $media->language()->getId();
+      $info[$media->id()][$langcode] = $langcode;
+    }
+    $this->tempStore->set($this->currentUser->id(), $info);
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function execute($object = NULL) {
+    $this->executeMultiple($object ? [$object] : []);
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function access($object, AccountInterface $account = NULL, $return_as_object = FALSE) {
+    /** @var \Drupal\media\MediaInterface $object */
+    return $object->access('delete', $account, $return_as_object);
+  }
+
+}
diff --git a/core/modules/media/src/Plugin/Action/PublishMedia.php b/core/modules/media/src/Plugin/Action/PublishMedia.php
new file mode 100644
index 0000000000000000000000000000000000000000..1c22e4f2bc3bb03bcdde16725f00e852b6a6c460
--- /dev/null
+++ b/core/modules/media/src/Plugin/Action/PublishMedia.php
@@ -0,0 +1,38 @@
+<?php
+
+namespace Drupal\media\Plugin\Action;
+
+use Drupal\Core\Action\ActionBase;
+use Drupal\Core\Session\AccountInterface;
+use Drupal\media\Entity\Media;
+
+/**
+ * Publishes a media entity.
+ *
+ * @Action(
+ *   id = "media_publish_action",
+ *   label = @Translation("Publish media"),
+ *   type = "media"
+ * )
+ */
+class PublishMedia extends ActionBase {
+
+  /**
+   * {@inheritdoc}
+   */
+  public function execute(Media $entity = NULL) {
+    $entity->setPublished()->save();
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function access($object, AccountInterface $account = NULL, $return_as_object = FALSE) {
+    /** @var \Drupal\media\MediaInterface $object */
+    $result = $object->access('update', $account, TRUE)
+      ->andIf($object->status->access('update', $account, TRUE));
+
+    return $return_as_object ? $result : $result->isAllowed();
+  }
+
+}
diff --git a/core/modules/media/src/Plugin/Action/SaveMedia.php b/core/modules/media/src/Plugin/Action/SaveMedia.php
new file mode 100644
index 0000000000000000000000000000000000000000..4a203607ac6468c2953d2bcf5bfe866c5d87b694
--- /dev/null
+++ b/core/modules/media/src/Plugin/Action/SaveMedia.php
@@ -0,0 +1,37 @@
+<?php
+
+namespace Drupal\media\Plugin\Action;
+
+use Drupal\Core\Action\ActionBase;
+use Drupal\Core\Session\AccountInterface;
+
+/**
+ * Provides an action that can save any entity.
+ *
+ * @Action(
+ *   id = "media_save_action",
+ *   label = @Translation("Save media"),
+ *   type = "media"
+ * )
+ */
+class SaveMedia extends ActionBase {
+
+  /**
+   * {@inheritdoc}
+   */
+  public function execute($entity = NULL) {
+    // We need to change at least one value, otherwise the changed timestamp
+    // will not be updated.
+    $entity->changed = 0;
+    $entity->save();
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function access($object, AccountInterface $account = NULL, $return_as_object = FALSE) {
+    /** @var \Drupal\media\MediaInterface $object */
+    return $object->access('update', $account, $return_as_object);
+  }
+
+}
diff --git a/core/modules/media/src/Plugin/Action/UnpublishMedia.php b/core/modules/media/src/Plugin/Action/UnpublishMedia.php
new file mode 100644
index 0000000000000000000000000000000000000000..05d12bfbd7261be9f69684d61d80b72933c33aa2
--- /dev/null
+++ b/core/modules/media/src/Plugin/Action/UnpublishMedia.php
@@ -0,0 +1,38 @@
+<?php
+
+namespace Drupal\media\Plugin\Action;
+
+use Drupal\Core\Action\ActionBase;
+use Drupal\Core\Session\AccountInterface;
+use Drupal\media\Entity\Media;
+
+/**
+ * Unpublishes a media entity.
+ *
+ * @Action(
+ *   id = "media_unpublish_action",
+ *   label = @Translation("Unpublish media"),
+ *   type = "media"
+ * )
+ */
+class UnpublishMedia extends ActionBase {
+
+  /**
+   * {@inheritdoc}
+   */
+  public function execute(Media $entity = NULL) {
+    $entity->setUnpublished()->save();
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function access($object, AccountInterface $account = NULL, $return_as_object = FALSE) {
+    /** @var \Drupal\media\MediaInterface $object */
+    $result = $object->access('update', $account, TRUE)
+      ->andIf($object->status->access('update', $account, TRUE));
+
+    return $return_as_object ? $result : $result->isAllowed();
+  }
+
+}
diff --git a/core/modules/media/src/Plugin/Field/FieldFormatter/MediaThumbnailFormatter.php b/core/modules/media/src/Plugin/Field/FieldFormatter/MediaThumbnailFormatter.php
new file mode 100644
index 0000000000000000000000000000000000000000..2f7d8aa57f45a975081a3162e8f171f072434b2c
--- /dev/null
+++ b/core/modules/media/src/Plugin/Field/FieldFormatter/MediaThumbnailFormatter.php
@@ -0,0 +1,190 @@
+<?php
+
+namespace Drupal\media\Plugin\Field\FieldFormatter;
+
+use Drupal\Core\Field\FieldItemListInterface;
+use Drupal\Core\Form\FormStateInterface;
+use Drupal\Core\Session\AccountInterface;
+use Drupal\image\ImageStyleStorageInterface;
+use Drupal\image\Plugin\Field\FieldFormatter\ImageFormatter;
+use Drupal\Core\Field\Plugin\Field\FieldType\EntityReferenceItem;
+use Drupal\Core\Render\RendererInterface;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+use Drupal\Core\Field\FieldDefinitionInterface;
+
+/**
+ * Plugin implementation of the 'media_thumbnail' formatter.
+ *
+ * @FieldFormatter(
+ *   id = "media_thumbnail",
+ *   label = @Translation("Thumbnail"),
+ *   field_types = {
+ *     "entity_reference"
+ *   }
+ * )
+ */
+class MediaThumbnailFormatter extends ImageFormatter {
+
+  /**
+   * The renderer service.
+   *
+   * @var \Drupal\Core\Render\RendererInterface
+   */
+  protected $renderer;
+
+  /**
+   * Constructs an ImageFormatter object.
+   *
+   * @param string $plugin_id
+   *   The plugin_id for the formatter.
+   * @param mixed $plugin_definition
+   *   The plugin implementation definition.
+   * @param \Drupal\Core\Field\FieldDefinitionInterface $field_definition
+   *   The definition of the field to which the formatter is associated.
+   * @param array $settings
+   *   The formatter settings.
+   * @param string $label
+   *   The formatter label display setting.
+   * @param string $view_mode
+   *   The view mode.
+   * @param array $third_party_settings
+   *   Any third party settings settings.
+   * @param \Drupal\Core\Session\AccountInterface $current_user
+   *   The current user.
+   * @param \Drupal\image\ImageStyleStorageInterface $image_style_storage
+   *   The image style entity storage handler.
+   * @param \Drupal\Core\Render\RendererInterface $renderer
+   *   The renderer service.
+   */
+  public function __construct($plugin_id, $plugin_definition, FieldDefinitionInterface $field_definition, array $settings, $label, $view_mode, array $third_party_settings, AccountInterface $current_user, ImageStyleStorageInterface $image_style_storage, RendererInterface $renderer) {
+    parent::__construct($plugin_id, $plugin_definition, $field_definition, $settings, $label, $view_mode, $third_party_settings, $current_user, $image_style_storage);
+    $this->renderer = $renderer;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
+    return new static(
+      $plugin_id,
+      $plugin_definition,
+      $configuration['field_definition'],
+      $configuration['settings'],
+      $configuration['label'],
+      $configuration['view_mode'],
+      $configuration['third_party_settings'],
+      $container->get('current_user'),
+      $container->get('entity_type.manager')->getStorage('image_style'),
+      $container->get('renderer')
+    );
+  }
+
+  /**
+   * {@inheritdoc}
+   *
+   * This has to be overridden because FileFormatterBase expects $item to be
+   * of type \Drupal\file\Plugin\Field\FieldType\FileItem and calls
+   * isDisplayed() which is not in FieldItemInterface.
+   */
+  protected function needsEntityLoad(EntityReferenceItem $item) {
+    return !$item->hasNewEntity();
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function settingsForm(array $form, FormStateInterface $form_state) {
+    $element = parent::settingsForm($form, $form_state);
+
+    $link_types = [
+      'content' => $this->t('Content'),
+      'media' => $this->t('Media entity'),
+    ];
+    $element['image_link']['#options'] = $link_types;
+
+    return $element;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function settingsSummary() {
+    $summary = parent::settingsSummary();
+
+    $link_types = [
+      'content' => $this->t('Linked to content'),
+      'media' => $this->t('Linked to media entity'),
+    ];
+    // Display this setting only if image is linked.
+    $image_link_setting = $this->getSetting('image_link');
+    if (isset($link_types[$image_link_setting])) {
+      $summary[] = $link_types[$image_link_setting];
+    }
+
+    return $summary;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function viewElements(FieldItemListInterface $items, $langcode) {
+    $elements = [];
+    $media = $this->getEntitiesToView($items, $langcode);
+
+    // Early opt-out if the field is empty.
+    if (empty($media)) {
+      return $elements;
+    }
+
+    $url = NULL;
+    $image_link_setting = $this->getSetting('image_link');
+    // Check if the formatter involves a link.
+    if ($image_link_setting == 'content') {
+      $entity = $items->getEntity();
+      if (!$entity->isNew()) {
+        $url = $entity->toUrl();
+      }
+    }
+    elseif ($image_link_setting == 'media') {
+      $link_media = TRUE;
+    }
+
+    $image_style_setting = $this->getSetting('image_style');
+
+    /** @var \Drupal\media\MediaInterface[] $media */
+    foreach ($media as $delta => $media_item) {
+      if (isset($link_media)) {
+        $url = $media_item->toUrl();
+      }
+
+      $elements[$delta] = [
+        '#theme' => 'image_formatter',
+        '#item' => $media_item->get('thumbnail'),
+        '#item_attributes' => [],
+        '#image_style' => $image_style_setting,
+        '#url' => $url,
+      ];
+
+      // Collect cache tags to be added for each item in the field.
+      $this->renderer->addCacheableDependency($elements[$delta], $media_item);
+    }
+
+    // Collect cache tags related to the image style setting.
+    if ($image_link_setting && ($image_style = $this->imageStyleStorage->load($image_style_setting))) {
+      $this->renderer->addCacheableDependency($elements, $image_style);
+    }
+
+    return $elements;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function isApplicable(FieldDefinitionInterface $field_definition) {
+    // This formatter is only available for entity types that reference
+    // media entities.
+    $target_type = $field_definition->getFieldStorageDefinition()->getSetting('target_type');
+    return $target_type == 'media';
+  }
+
+}
diff --git a/core/modules/media/src/Plugin/QueueWorker/ThumbnailDownloader.php b/core/modules/media/src/Plugin/QueueWorker/ThumbnailDownloader.php
new file mode 100644
index 0000000000000000000000000000000000000000..04d6db7d350d60559f6fc6ea4f4bced57bc345ca
--- /dev/null
+++ b/core/modules/media/src/Plugin/QueueWorker/ThumbnailDownloader.php
@@ -0,0 +1,30 @@
+<?php
+
+namespace Drupal\media\Plugin\QueueWorker;
+
+use Drupal\media\Entity\Media;
+use Drupal\Core\Queue\QueueWorkerBase;
+
+/**
+ * Download images.
+ *
+ * @QueueWorker(
+ *   id = "media_entity_thumbnail",
+ *   title = @Translation("Thumbnail downloader"),
+ *   cron = {"time" = 60}
+ * )
+ */
+class ThumbnailDownloader extends QueueWorkerBase {
+
+  /**
+   * {@inheritdoc}
+   */
+  public function processItem($data) {
+    /** @var \Drupal\media\MediaInterface $entity */
+    if ($entity = Media::load($data['id'])) {
+      $entity->automaticallySetThumbnail();
+      $entity->save();
+    }
+  }
+
+}
diff --git a/core/modules/media/src/Plugin/media/Handler/File.php b/core/modules/media/src/Plugin/media/Handler/File.php
new file mode 100644
index 0000000000000000000000000000000000000000..bec4301c216cc0fc99dc225b35f34dc129ec3003
--- /dev/null
+++ b/core/modules/media/src/Plugin/media/Handler/File.php
@@ -0,0 +1,110 @@
+<?php
+
+namespace Drupal\media\Plugin\media\Handler;
+
+use Drupal\media\MediaInterface;
+use Drupal\media\MediaHandlerBase;
+
+/**
+ * Provides the media handler plugin for Files.
+ *
+ * @MediaHandler(
+ *   id = "file",
+ *   label = @Translation("File"),
+ *   description = @Translation("Provides business logic and metadata for local files and documents."),
+ *   allowed_field_types = {"file"},
+ * )
+ */
+class File extends MediaHandlerBase {
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getProvidedFields() {
+    return [
+      'mime' => $this->t('MIME type'),
+      'size' => $this->t('Size'),
+    ];
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getField(MediaInterface $media, $name) {
+    $file = $this->getSourceFieldValue($media);
+
+    switch ($name) {
+      case 'mime':
+        return $file->getMimeType() ?: FALSE;
+
+      case 'size':
+        $size = $file->getSize();
+        return is_numeric($size) ? $size : FALSE;
+    }
+
+    return FALSE;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getThumbnail(MediaInterface $media) {
+    $file = $this->getSourceFieldValue($media);
+    $icon_base = $this->configFactory->get('media.settings')->get('icon_base');
+    $thumbnail = FALSE;
+
+    // We try to magically use the most specific icon present in the $icon_base
+    // directory, based on the mime information. For instance, if an icon file
+    // named "pdf.png" is present, it will be used if the file matches this
+    // mime type.
+    if ($file) {
+      $mimetype = $file->getMimeType();
+      $mimetype = explode('/', $mimetype);
+      $thumbnail = $icon_base . "/{$mimetype[0]}--{$mimetype[1]}.png";
+
+      if (!is_file($thumbnail)) {
+        $thumbnail = $icon_base . "/{$mimetype[1]}.png";
+      }
+    }
+
+    if (!is_file($thumbnail)) {
+      $thumbnail = $icon_base . '/generic.png';
+    }
+
+    return $thumbnail;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getDefaultName(MediaInterface $media) {
+    // The default name will be the filename of the source_field, if present.
+    $file = $this->getSourceFieldValue($media);
+    return $file->getFilename();
+  }
+
+  /**
+   * Get source field file entity.
+   *
+   * @param \Drupal\media\MediaInterface $media
+   *   The media entity.
+   *
+   * @return \Drupal\file\FileInterface
+   *   The file entity present in the source field.
+   */
+  protected function getSourceFieldValue(MediaInterface $media) {
+    $source_field = $this->configuration['source_field'];
+
+    if (empty($source_field)) {
+      throw new \RuntimeException('Source field for media file handler is not defined.');
+    }
+
+    $file = $media->get($source_field)->entity;
+    if (empty($file)) {
+      throw new \RuntimeException('The source field does not contain a file entity.');
+    }
+
+    return $file;
+  }
+
+}
diff --git a/core/modules/media/src/Plugin/views/wizard/Media.php b/core/modules/media/src/Plugin/views/wizard/Media.php
new file mode 100644
index 0000000000000000000000000000000000000000..831613537b91f274fce3a65ff1ac861576346dbc
--- /dev/null
+++ b/core/modules/media/src/Plugin/views/wizard/Media.php
@@ -0,0 +1,86 @@
+<?php
+
+namespace Drupal\media\Plugin\views\wizard;
+
+use Drupal\views\Plugin\views\wizard\WizardPluginBase;
+
+/**
+ * Provides views creation wizard for Media.
+ *
+ * @ViewsWizard(
+ *   id = "media",
+ *   base_table = "media_field_data",
+ *   title = @Translation("Media")
+ * )
+ */
+class Media extends WizardPluginBase {
+
+  /**
+   * Set the created column.
+   *
+   * @var string
+   */
+  protected $createdColumn = 'media_field_data-created';
+
+  /**
+   * Set default values for the filters.
+   */
+  protected $filters = [
+    'status' => [
+      'value' => TRUE,
+      'table' => 'media_field_data',
+      'field' => 'status',
+      'plugin_id' => 'boolean',
+      'entity_type' => 'media',
+      'entity_field' => 'status',
+    ],
+  ];
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getAvailableSorts() {
+    return [
+      'media_field_data-name:DESC' => $this->t('Media name'),
+    ];
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function defaultDisplayOptions() {
+    $display_options = parent::defaultDisplayOptions();
+
+    // Add permission-based access control.
+    $display_options['access']['type'] = 'perm';
+    $display_options['access']['options']['perm'] = 'view media';
+
+    // Remove the default fields, since we are customizing them here.
+    unset($display_options['fields']);
+
+    // Add the name field, so that the display has content if the user switches
+    // to a row style that uses fields.
+    /* Field: Media: Name */
+    $display_options['fields']['name']['id'] = 'name';
+    $display_options['fields']['name']['table'] = 'media_field_data';
+    $display_options['fields']['name']['field'] = 'name';
+    $display_options['fields']['name']['entity_type'] = 'media';
+    $display_options['fields']['name']['entity_field'] = 'media';
+    $display_options['fields']['name']['label'] = '';
+    $display_options['fields']['name']['alter']['alter_text'] = 0;
+    $display_options['fields']['name']['alter']['make_link'] = 0;
+    $display_options['fields']['name']['alter']['absolute'] = 0;
+    $display_options['fields']['name']['alter']['trim'] = 0;
+    $display_options['fields']['name']['alter']['word_boundary'] = 0;
+    $display_options['fields']['name']['alter']['ellipsis'] = 0;
+    $display_options['fields']['name']['alter']['strip_tags'] = 0;
+    $display_options['fields']['name']['alter']['html'] = 0;
+    $display_options['fields']['name']['hide_empty'] = 0;
+    $display_options['fields']['name']['empty_zero'] = 0;
+    $display_options['fields']['name']['settings']['link_to_entity'] = 1;
+    $display_options['fields']['name']['plugin_id'] = 'field';
+
+    return $display_options;
+  }
+
+}
diff --git a/core/modules/media/src/Plugin/views/wizard/MediaRevision.php b/core/modules/media/src/Plugin/views/wizard/MediaRevision.php
new file mode 100644
index 0000000000000000000000000000000000000000..8513778c53d475c94f60c4feb1f4f49c222daa59
--- /dev/null
+++ b/core/modules/media/src/Plugin/views/wizard/MediaRevision.php
@@ -0,0 +1,97 @@
+<?php
+
+namespace Drupal\media\Plugin\views\wizard;
+
+use Drupal\views\Plugin\views\wizard\WizardPluginBase;
+
+/**
+ * Provides views creation wizard for Media revisions.
+ *
+ * @ViewsWizard(
+ *   id = "media_revision",
+ *   base_table = "media_field_revision",
+ *   title = @Translation("Media revisions")
+ * )
+ */
+class MediaRevision extends WizardPluginBase {
+
+  /**
+   * Set the created column.
+   *
+   * @var string
+   */
+  protected $createdColumn = 'changed';
+
+  /**
+   * Set default values for the filters.
+   */
+  protected $filters = [
+    'status' => [
+      'value' => TRUE,
+      'table' => 'media_field_revision',
+      'field' => 'status',
+      'plugin_id' => 'boolean',
+      'entity_type' => 'media',
+      'entity_field' => 'status',
+    ],
+  ];
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function defaultDisplayOptions() {
+    $display_options = parent::defaultDisplayOptions();
+
+    // Add permission-based access control.
+    $display_options['access']['type'] = 'perm';
+    $display_options['access']['options']['perm'] = 'view all revisions';
+
+    // Remove the default fields, since we are customizing them here.
+    unset($display_options['fields']);
+
+    /* Field: Media revision: Created date */
+    $display_options['fields']['changed']['id'] = 'changed';
+    $display_options['fields']['changed']['table'] = 'media_field_revision';
+    $display_options['fields']['changed']['field'] = 'changed';
+    $display_options['fields']['changed']['entity_type'] = 'media';
+    $display_options['fields']['changed']['entity_field'] = 'changed';
+    $display_options['fields']['changed']['alter']['alter_text'] = FALSE;
+    $display_options['fields']['changed']['alter']['make_link'] = FALSE;
+    $display_options['fields']['changed']['alter']['absolute'] = FALSE;
+    $display_options['fields']['changed']['alter']['trim'] = FALSE;
+    $display_options['fields']['changed']['alter']['word_boundary'] = FALSE;
+    $display_options['fields']['changed']['alter']['ellipsis'] = FALSE;
+    $display_options['fields']['changed']['alter']['strip_tags'] = FALSE;
+    $display_options['fields']['changed']['alter']['html'] = FALSE;
+    $display_options['fields']['changed']['hide_empty'] = FALSE;
+    $display_options['fields']['changed']['empty_zero'] = FALSE;
+    $display_options['fields']['changed']['plugin_id'] = 'field';
+    $display_options['fields']['changed']['type'] = 'timestamp';
+    $display_options['fields']['changed']['settings']['date_format'] = 'medium';
+    $display_options['fields']['changed']['settings']['custom_date_format'] = '';
+    $display_options['fields']['changed']['settings']['timezone'] = '';
+
+    /* Field: Media revision: Name */
+    $display_options['fields']['name']['id'] = 'name';
+    $display_options['fields']['name']['table'] = 'media_field_revision';
+    $display_options['fields']['name']['field'] = 'name';
+    $display_options['fields']['name']['entity_type'] = 'media';
+    $display_options['fields']['name']['entity_field'] = 'name';
+    $display_options['fields']['name']['label'] = '';
+    $display_options['fields']['name']['alter']['alter_text'] = 0;
+    $display_options['fields']['name']['alter']['make_link'] = 0;
+    $display_options['fields']['name']['alter']['absolute'] = 0;
+    $display_options['fields']['name']['alter']['trim'] = 0;
+    $display_options['fields']['name']['alter']['word_boundary'] = 0;
+    $display_options['fields']['name']['alter']['ellipsis'] = 0;
+    $display_options['fields']['name']['alter']['strip_tags'] = 0;
+    $display_options['fields']['name']['alter']['html'] = 0;
+    $display_options['fields']['name']['hide_empty'] = 0;
+    $display_options['fields']['name']['empty_zero'] = 0;
+    $display_options['fields']['name']['settings']['link_to_entity'] = 0;
+    $display_options['fields']['name']['plugin_id'] = 'field';
+
+    return $display_options;
+  }
+
+}
diff --git a/core/modules/media/src/SourceFieldInterface.php b/core/modules/media/src/SourceFieldInterface.php
new file mode 100644
index 0000000000000000000000000000000000000000..2c35af58b2ec3addda0b9ee26cb5d50dc42965ef
--- /dev/null
+++ b/core/modules/media/src/SourceFieldInterface.php
@@ -0,0 +1,21 @@
+<?php
+
+namespace Drupal\media;
+
+/**
+ * Interface for media handler plugins that depend on a field.
+ */
+interface SourceFieldInterface extends MediaHandlerInterface {
+
+  /**
+   * Returns the source field for a bundle using this plugin.
+   *
+   * @param \Drupal\media\MediaTypeInterface $type
+   *   The media bundle.
+   *
+   * @return \Drupal\field\FieldConfigInterface
+   *   The source field definition.
+   */
+  public function getSourceField(MediaTypeInterface $type);
+
+}
diff --git a/core/modules/media/templates/media.html.twig b/core/modules/media/templates/media.html.twig
new file mode 100644
index 0000000000000000000000000000000000000000..adbc176bfbe81775cd8130c157e07e30b85eb098
--- /dev/null
+++ b/core/modules/media/templates/media.html.twig
@@ -0,0 +1,48 @@
+{#
+/**
+ * @file
+ * Default theme implementation to present a media entity.
+ *
+ * Available variables:
+ * - media: The entity with limited access to object properties and methods.
+ *   Only method names starting with "get", "has", or "is" and a few common
+ *   methods such as "id", "label", and "bundle" are available. For example:
+ *   - entity.getEntityTypeId() will return the entity type ID.
+ *   - entity.hasField('field_example') returns TRUE if the entity includes
+ *     field_example. (This does not indicate the presence of a value in this
+ *     field.)
+ *   Calling other methods, such as entity.delete(), will result in an exception.
+ *   See \Drupal\Core\Entity\EntityInterface for a full list of methods.
+ * - name: Name of the media.
+ * - content: Media content.
+ * - title_prefix: Additional output populated by modules, intended to be
+ *   displayed in front of the main title tag that appears in the template.
+ * - title_suffix: Additional output populated by modules, intended to be
+ *   displayed after the main title tag that appears in the template.
+ * - view_mode: View mode; for example, "teaser" or "full".
+ * - attributes: HTML attributes for the containing element.
+ * - title_attributes: Same as attributes, except applied to the main title
+ *   tag that appears in the template.
+ *
+ * @see template_preprocess_media()
+ *
+ * @ingroup themeable
+ */
+#}
+<article{{ attributes }}>
+  {#
+    In the 'full' view mode the entity label is assumed to be displayed as the
+    page title, so we do not display it here.
+  #}
+  {{ title_prefix }}
+  {% if label and view_mode != 'full' %}
+    <h2{{ title_attributes }}>
+      {{ label }}
+    </h2>
+  {% endif %}
+  {{ title_suffix }}
+
+  {% if content %}
+    {{ content }}
+  {% endif %}
+</article>
diff --git a/core/modules/media/tests/modules/media_test_handler/config/schema/media_test_handler.schema.yml b/core/modules/media/tests/modules/media_test_handler/config/schema/media_test_handler.schema.yml
new file mode 100644
index 0000000000000000000000000000000000000000..63abccd1bbc8505135c072bdba5151a8fa488c00
--- /dev/null
+++ b/core/modules/media/tests/modules/media_test_handler/config/schema/media_test_handler.schema.yml
@@ -0,0 +1,7 @@
+media.handler.test:
+  type: media.handler.field_aware
+  label: 'Test handler configuration'
+  mapping:
+    test_config_value:
+      type: string
+      label: 'Test config value'
diff --git a/core/modules/media/tests/modules/media_test_handler/media_test_handler.info.yml b/core/modules/media/tests/modules/media_test_handler/media_test_handler.info.yml
new file mode 100644
index 0000000000000000000000000000000000000000..e29fe8c2c9773c1554d7e5a5cb9ff31404271176
--- /dev/null
+++ b/core/modules/media/tests/modules/media_test_handler/media_test_handler.info.yml
@@ -0,0 +1,6 @@
+name: 'Test media handler'
+type: module
+description: 'Provides test media handler to test configuration forms.'
+core: 8.x
+package: Testing
+version: VERSION
diff --git a/core/modules/media/tests/modules/media_test_handler/src/Plugin/media/Handler/Test.php b/core/modules/media/tests/modules/media_test_handler/src/Plugin/media/Handler/Test.php
new file mode 100644
index 0000000000000000000000000000000000000000..c21f1e6437eb694036adf2ecb332314938b2f6bb
--- /dev/null
+++ b/core/modules/media/tests/modules/media_test_handler/src/Plugin/media/Handler/Test.php
@@ -0,0 +1,69 @@
+<?php
+
+namespace Drupal\media_test_handler\Plugin\media\Handler;
+
+use Drupal\Core\Form\FormStateInterface;
+use Drupal\media\MediaInterface;
+use Drupal\media\MediaHandlerBase;
+
+/**
+ * Provides generic media type.
+ *
+ * @MediaHandler(
+ *   id = "test",
+ *   label = @Translation("Test handler"),
+ *   description = @Translation("Test media handler."),
+ *   allowed_field_types = {"string"},
+ * )
+ */
+class Test extends MediaHandlerBase {
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getThumbnail(MediaInterface $media) {
+    return $this->getDefaultThumbnail();
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getProvidedFields() {
+    return [
+      'field_1' => $this->t('Field 1'),
+      'field_2' => $this->t('Field 2'),
+    ];
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getField(MediaInterface $media, $name) {
+    return FALSE;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function defaultConfiguration() {
+    return parent::defaultConfiguration() + [
+      'test_config_value' => 'This is default value.',
+    ];
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function buildConfigurationForm(array $form, FormStateInterface $form_state) {
+    $form = parent::buildConfigurationForm($form, $form_state);
+
+    $form['test_config_value'] = [
+      '#type' => 'textfield',
+      '#title' => $this->t('Test config value'),
+      '#default_value' => empty($this->configuration['test_config_value']) ? NULL : $this->configuration['test_config_value'],
+    ];
+
+    return $form;
+  }
+
+}
diff --git a/core/modules/media/tests/modules/media_test_type/config/install/media.type.test.yml b/core/modules/media/tests/modules/media_test_type/config/install/media.type.test.yml
new file mode 100644
index 0000000000000000000000000000000000000000..3256baf95224396781f351c0c512704bf40b31fd
--- /dev/null
+++ b/core/modules/media/tests/modules/media_test_type/config/install/media.type.test.yml
@@ -0,0 +1,10 @@
+id: test
+label: 'Test type'
+description: 'Test type.'
+handler: test
+handler_configuration:
+  test_config_value: 'Kakec'
+status: true
+langcode: en
+dependencies: {  }
+field_map: {  }
diff --git a/core/modules/media/tests/modules/media_test_type/media_test_type.info.yml b/core/modules/media/tests/modules/media_test_type/media_test_type.info.yml
new file mode 100644
index 0000000000000000000000000000000000000000..b3512de959a90b0be68e4c9bfb85c5c1866ba47b
--- /dev/null
+++ b/core/modules/media/tests/modules/media_test_type/media_test_type.info.yml
@@ -0,0 +1,8 @@
+name: 'Media test type'
+type: module
+description: 'Provides test type for media entity.'
+core: 8.x
+package: Testing
+version: VERSION
+dependencies:
+  - media_test_handler
diff --git a/core/modules/media/tests/modules/media_test_views/config/install/views.view.test_media_bulk_form.yml b/core/modules/media/tests/modules/media_test_views/config/install/views.view.test_media_bulk_form.yml
new file mode 100644
index 0000000000000000000000000000000000000000..dd432bbfbd07ec78f90e8809d0856b8a58482eaf
--- /dev/null
+++ b/core/modules/media/tests/modules/media_test_views/config/install/views.view.test_media_bulk_form.yml
@@ -0,0 +1,154 @@
+langcode: en
+status: true
+dependencies:
+  module:
+    - media
+    - user
+id: test_media_bulk_form
+label: ''
+module: views
+description: ''
+tag: ''
+base_table: media_field_data
+base_field: mid
+core: 8.x
+display:
+  default:
+    display_plugin: default
+    id: default
+    display_title: Master
+    position: 0
+    display_options:
+      style:
+        type: table
+      row:
+        type: fields
+      fields:
+        media_bulk_form:
+          id: media_bulk_form
+          table: media
+          field: media_bulk_form
+          element_type: ''
+          element_class: ''
+          element_label_type: ''
+          element_label_class: ''
+          element_label_colon: false
+          element_wrapper_type: ''
+          element_wrapper_class: ''
+          element_default_classes: true
+          empty: ''
+          hide_empty: false
+          empty_zero: false
+          hide_alter_empty: true
+          action_title: 'With selection'
+          include_exclude: exclude
+          selected_actions: {  }
+          entity_type: media
+          plugin_id: media_bulk_form
+        name:
+          id: name
+          table: media_field_data
+          field: name
+          entity_type: media
+          entity_field: media
+          hide_empty: false
+          empty_zero: false
+          settings:
+            link_to_entity: false
+          plugin_id: field
+          relationship: none
+          group_type: group
+          admin_label: ''
+          label: 'Media name'
+          exclude: false
+          element_type: ''
+          element_class: ''
+          element_label_type: ''
+          element_label_class: ''
+          element_label_colon: true
+          element_wrapper_type: ''
+          element_wrapper_class: ''
+          element_default_classes: true
+          empty: ''
+          hide_alter_empty: true
+          click_sort_column: value
+          type: string
+          group_column: value
+          group_columns: {  }
+          group_rows: true
+          delta_limit: 0
+          delta_offset: 0
+          delta_reversed: false
+          delta_first_last: false
+          multi_type: separator
+          separator: ', '
+          field_api_classes: false
+        status:
+          id: status
+          table: media_field_data
+          field: status
+          relationship: none
+          group_type: group
+          admin_label: ''
+          label: Status
+          exclude: false
+          element_type: ''
+          element_class: ''
+          element_label_type: ''
+          element_label_class: ''
+          element_label_colon: true
+          element_wrapper_type: ''
+          element_wrapper_class: ''
+          element_default_classes: true
+          empty: ''
+          hide_empty: false
+          empty_zero: false
+          hide_alter_empty: true
+          click_sort_column: value
+          type: boolean
+          settings:
+            format: custom
+            format_custom_true: Published
+            format_custom_false: Unpublished
+          group_column: value
+          group_columns: {  }
+          group_rows: true
+          delta_limit: 0
+          delta_offset: 0
+          delta_reversed: false
+          delta_first_last: false
+          multi_type: separator
+          separator: ', '
+          field_api_classes: false
+          entity_type: media
+          entity_field: status
+          plugin_id: field
+      sorts:
+        mid:
+          id: mid
+          table: media_field_data
+          field: mid
+          relationship: none
+          group_type: group
+          admin_label: ''
+          order: ASC
+          exposed: false
+          expose:
+            label: ''
+          entity_type: media
+          entity_field: mid
+          plugin_id: standard
+      title: 'Entity bulk form test view'
+      header: {  }
+      footer: {  }
+      empty: {  }
+      relationships: {  }
+      arguments: {  }
+      display_extenders: {  }
+  page_1:
+    display_plugin: page
+    id: page_1
+    display_title: Page
+    position: 1
+    display_options:
+      path: test-media-bulk-form
diff --git a/core/modules/media/tests/modules/media_test_views/media_test_views.info.yml b/core/modules/media/tests/modules/media_test_views/media_test_views.info.yml
new file mode 100644
index 0000000000000000000000000000000000000000..4962319b3b183991aace6ca2dac1ff07c2f8ac61
--- /dev/null
+++ b/core/modules/media/tests/modules/media_test_views/media_test_views.info.yml
@@ -0,0 +1,9 @@
+name: 'Media test views'
+type: module
+description: 'Provides default views for views media tests.'
+package: Testing
+version: VERSION
+core: 8.x
+dependencies:
+  - media
+  - views
diff --git a/core/modules/media/tests/src/Functional/MediaAccessTest.php b/core/modules/media/tests/src/Functional/MediaAccessTest.php
new file mode 100644
index 0000000000000000000000000000000000000000..2bf276631417b53d1ccd8fed29136e8b01a2f740
--- /dev/null
+++ b/core/modules/media/tests/src/Functional/MediaAccessTest.php
@@ -0,0 +1,100 @@
+<?php
+
+namespace Drupal\Tests\media\Functional;
+
+use Drupal\media\Entity\Media;
+use Drupal\user\Entity\Role;
+
+/**
+ * Basic access tests for Media.
+ *
+ * @group media
+ */
+class MediaAccessTest extends MediaFunctionalTestBase {
+
+  /**
+   * The test media bundle.
+   *
+   * @var \Drupal\media\MediaTypeInterface
+   */
+  protected $testBundle;
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function setUp() {
+    parent::setUp();
+    $this->testBundle = $this->drupalCreateMediaType();
+  }
+
+  /**
+   * Test some access control functionality.
+   */
+  public function testMediaAccess() {
+    $assert_session = $this->assertSession();
+
+    // Create media.
+    $media = Media::create([
+      'bundle' => $this->testBundle->id(),
+      'name' => 'Unnamed',
+    ]);
+    $media->save();
+    $user_media = Media::create([
+      'bundle' => $this->testBundle->id(),
+      'name' => 'Unnamed',
+      'uid' => $this->nonAdminUser->id(),
+    ]);
+    $user_media->save();
+
+    // We are logged-in as admin, so test 'administer media' permission.
+    $this->drupalGet('media/' . $user_media->id());
+    $assert_session->statusCodeEquals(200);
+    $this->drupalGet('media/' . $user_media->id() . '/edit');
+    $assert_session->statusCodeEquals(200);
+    $this->drupalGet('media/' . $user_media->id() . '/delete');
+    $assert_session->statusCodeEquals(200);
+
+    $this->drupalLogin($this->nonAdminUser);
+    /** @var \Drupal\user\RoleInterface $role */
+    $role = Role::load('authenticated');
+
+    // Test 'view media' permission.
+    $this->drupalGet('media/' . $media->id());
+    $assert_session->statusCodeEquals(403);
+    $this->grantPermissions($role, ['view media']);
+    $this->drupalGet('media/' . $media->id());
+    $assert_session->statusCodeEquals(200);
+
+    // Test 'create media' permission.
+    $this->drupalGet('media/add/' . $this->testBundle->id());
+    $assert_session->statusCodeEquals(403);
+    $this->grantPermissions($role, ['create media']);
+    $this->drupalGet('media/add/' . $this->testBundle->id());
+    $assert_session->statusCodeEquals(200);
+
+    // Test 'update media' and 'delete media' permissions.
+    $this->drupalGet('media/' . $user_media->id() . '/edit');
+    $assert_session->statusCodeEquals(403);
+    $this->drupalGet('media/' . $user_media->id() . '/delete');
+    $assert_session->statusCodeEquals(403);
+    $this->grantPermissions($role, ['update media']);
+    $this->grantPermissions($role, ['delete media']);
+    $this->drupalGet('media/' . $user_media->id() . '/edit');
+    $assert_session->statusCodeEquals(200);
+    $this->drupalGet('media/' . $user_media->id() . '/delete');
+    $assert_session->statusCodeEquals(200);
+
+    // Test 'update any media' and 'delete any media' permissions.
+    $this->drupalGet('media/' . $media->id() . '/edit');
+    $assert_session->statusCodeEquals(403);
+    $this->drupalGet('media/' . $media->id() . '/delete');
+    $assert_session->statusCodeEquals(403);
+    $this->grantPermissions($role, ['update any media']);
+    $this->grantPermissions($role, ['delete any media']);
+    $this->drupalGet('media/' . $media->id() . '/edit');
+    $assert_session->statusCodeEquals(200);
+    $this->drupalGet('media/' . $media->id() . '/delete');
+    $assert_session->statusCodeEquals(200);
+  }
+
+}
diff --git a/core/modules/media/tests/src/Functional/MediaBulkFormTest.php b/core/modules/media/tests/src/Functional/MediaBulkFormTest.php
new file mode 100644
index 0000000000000000000000000000000000000000..41e7b898b86415f9f99f3367c16e8de7a955c7c4
--- /dev/null
+++ b/core/modules/media/tests/src/Functional/MediaBulkFormTest.php
@@ -0,0 +1,115 @@
+<?php
+
+namespace Drupal\Tests\media\Functional;
+
+use Drupal\media\Entity\Media;
+use Drupal\views\Views;
+
+/**
+ * Tests a media bulk form.
+ *
+ * @group media
+ */
+class MediaBulkFormTest extends MediaFunctionalTestBase {
+
+  /**
+   * Modules to be enabled.
+   *
+   * @var array
+   */
+  public static $modules = ['media_test_views'];
+
+  /**
+   * The test media bundle.
+   *
+   * @var \Drupal\media\MediaTypeInterface
+   */
+  protected $testBundle;
+
+  /**
+   * The test media entities.
+   *
+   * @var \Drupal\media\MediaInterface[]
+   */
+  protected $mediaEntities;
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function setUp() {
+    parent::setUp();
+
+    $this->testBundle = $this->drupalCreateMediaType();
+
+    // Create some test media entities.
+    $this->mediaEntities = [];
+    for ($i = 1; $i <= 5; $i++) {
+      $media = Media::create([
+        'bundle' => $this->testBundle->id(),
+      ]);
+      $media->save();
+      $this->mediaEntities[] = $media;
+    }
+  }
+
+  /**
+   * Tests the media bulk form.
+   */
+  public function testBulkForm() {
+    $session = $this->getSession();
+    $page = $session->getPage();
+    $assert_session = $this->assertSession();
+
+    // Check that all created entities are present in the test view.
+    $view = Views::getView('test_media_bulk_form');
+    $view->execute();
+    $this->assertEquals($view->total_rows, 5);
+
+    // Check the operations are accessible to the logged in user.
+    $this->drupalGet('test-media-bulk-form');
+    // Current available actions: Delete, Save, Publish, Unpublish.
+    $available_actions = [
+      'media_delete_action',
+      'media_publish_action',
+      'media_save_action',
+      'media_unpublish_action',
+    ];
+    foreach ($available_actions as $action_name) {
+      $assert_session->optionExists('action', $action_name);
+    }
+
+    // Test unpublishing in bulk.
+    $page->checkField('media_bulk_form[0]');
+    $page->checkField('media_bulk_form[1]');
+    $page->checkField('media_bulk_form[2]');
+    $page->selectFieldOption('action', 'media_unpublish_action');
+    $page->pressButton('Apply to selected items');
+    $assert_session->pageTextContains('Unpublish media was applied to 3 items');
+    for ($i = 1; $i <= 3; $i++) {
+      $this->assertFalse($this->storage->loadUnchanged($i)->isPublished(), 'The unpublish action failed in some of the media entities.');
+    }
+
+    // Test publishing in bulk.
+    $page->checkField('media_bulk_form[0]');
+    $page->checkField('media_bulk_form[1]');
+    $page->selectFieldOption('action', 'media_publish_action');
+    $page->pressButton('Apply to selected items');
+    $assert_session->pageTextContains('Publish media was applied to 2 items');
+    for ($i = 1; $i <= 2; $i++) {
+      $this->assertTrue($this->storage->loadUnchanged($i)->isPublished(), 'The publish action failed in some of the media entities.');
+    }
+
+    // Test deletion in bulk.
+    $page->checkField('media_bulk_form[0]');
+    $page->checkField('media_bulk_form[1]');
+    $page->selectFieldOption('action', 'media_delete_action');
+    $page->pressButton('Apply to selected items');
+    $assert_session->pageTextContains('Are you sure you want to delete these items?');
+    $page->pressButton('Delete');
+    $assert_session->pageTextContains('Deleted 2 media entities.');
+    for ($i = 1; $i <= 2; $i++) {
+      $this->assertNull($this->storage->loadUnchanged($i), 'Could not delete some of the media entities.');
+    }
+  }
+
+}
diff --git a/core/modules/media/tests/src/Functional/MediaFunctionalTestBase.php b/core/modules/media/tests/src/Functional/MediaFunctionalTestBase.php
new file mode 100644
index 0000000000000000000000000000000000000000..254bb4bb9855e21421623fb6bd7ec816e9d121ca
--- /dev/null
+++ b/core/modules/media/tests/src/Functional/MediaFunctionalTestBase.php
@@ -0,0 +1,96 @@
+<?php
+
+namespace Drupal\Tests\media\Functional;
+
+use Drupal\Tests\BrowserTestBase;
+
+/**
+ * Base class for Media functional tests.
+ *
+ * @package Drupal\Tests\media\Functional
+ */
+abstract class MediaFunctionalTestBase extends BrowserTestBase {
+
+  use MediaFunctionalTestTrait {
+    createMediaType as drupalCreateMediaType;
+  }
+
+  /**
+   * Modules to enable.
+   *
+   * @var array
+   */
+  public static $modules = [
+    'system',
+    'node',
+    'field_ui',
+    'views_ui',
+    'media',
+    'media_test_handler',
+  ];
+
+  /**
+   * Permissions for the admin user that will be logged-in for test.
+   *
+   * @var array
+   */
+  protected static $adminUserPermissions = [
+    // Media entity permissions.
+    'administer media',
+    'administer media fields',
+    'administer media form display',
+    'administer media display',
+    'administer media types',
+    'view media',
+    'create media',
+    'update media',
+    'update any media',
+    'delete media',
+    'delete any media',
+    // Other permissions.
+    'administer views',
+    'access content overview',
+    'view all revisions',
+    'administer content types',
+    'administer node fields',
+    'administer node form display',
+    'bypass node access',
+  ];
+
+  /**
+   * An admin test user account.
+   *
+   * @var \Drupal\Core\Session\AccountInterface;
+   */
+  protected $adminUser;
+
+  /**
+   * A non-admin test user account.
+   *
+   * @var \Drupal\Core\Session\AccountInterface;
+   */
+  protected $nonAdminUser;
+
+  /**
+   * The storage service.
+   *
+   * @var \Drupal\Core\Entity\EntityStorageInterface;
+   */
+  protected $storage;
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function setUp() {
+    parent::setUp();
+
+    // Have two users ready to be used in tests.
+    $this->adminUser = $this->drupalCreateUser(static::$adminUserPermissions);
+    $this->nonAdminUser = $this->drupalCreateUser([]);
+    // Start off logged in as admin.
+    $this->drupalLogin($this->adminUser);
+
+    $this->storage = $this->container->get('entity_type.manager')->getStorage('media');
+  }
+
+}
diff --git a/core/modules/media/tests/src/Functional/MediaFunctionalTestTrait.php b/core/modules/media/tests/src/Functional/MediaFunctionalTestTrait.php
new file mode 100644
index 0000000000000000000000000000000000000000..e4f078b33f9a1e06eff13d0c58eac95cb00074f2
--- /dev/null
+++ b/core/modules/media/tests/src/Functional/MediaFunctionalTestTrait.php
@@ -0,0 +1,48 @@
+<?php
+
+namespace Drupal\Tests\media\Functional;
+
+use Drupal\media\Entity\MediaType;
+
+/**
+ * Trait with helpers for Media functional tests.
+ */
+trait MediaFunctionalTestTrait {
+
+  /**
+   * Creates a media type.
+   *
+   * @param array $values
+   *   The media type values.
+   * @param string $handler
+   *   (optional) The handler plugin that is responsible for additional logic
+   *   related to this media type.
+   *
+   * @return \Drupal\media\MediaTypeInterface
+   *   A newly created media type.
+   */
+  protected function createMediaType(array $values = [], $handler = 'test') {
+    if (!isset($values['bundle'])) {
+      $id = strtolower($this->randomMachineName());
+    }
+    else {
+      $id = $values['bundle'];
+    }
+    $values += [
+      'id' => $id,
+      'label' => $id,
+      'handler' => $handler,
+      'handler_configuration' => [],
+      'field_map' => [],
+      'new_revision' => FALSE,
+    ];
+
+    $bundle = MediaType::create($values);
+    $status = $bundle->save();
+
+    $this->assertEquals($status, SAVED_NEW, 'Media type was created successfully.');
+
+    return $bundle;
+  }
+
+}
diff --git a/core/modules/media/tests/src/Functional/MediaUiFunctionalTest.php b/core/modules/media/tests/src/Functional/MediaUiFunctionalTest.php
new file mode 100644
index 0000000000000000000000000000000000000000..c4ff32545a83ab44f2b22d6b948769316908d8ef
--- /dev/null
+++ b/core/modules/media/tests/src/Functional/MediaUiFunctionalTest.php
@@ -0,0 +1,164 @@
+<?php
+
+namespace Drupal\Tests\media\Functional;
+
+use Drupal\media\Entity\Media;
+
+/**
+ * Ensures that media UI works correctly.
+ *
+ * @group media
+ */
+class MediaUiFunctionalTest extends MediaFunctionalTestBase {
+
+  /**
+   * Modules to enable.
+   *
+   * @var array
+   */
+  public static $modules = [
+    'block',
+    'media_test_handler',
+  ];
+
+  /**
+   * The test media bundle.
+   *
+   * @var \Drupal\media\MediaTypeInterface
+   */
+  protected $testBundle;
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function setUp() {
+    parent::setUp();
+    $this->drupalPlaceBlock('local_actions_block');
+    $this->drupalPlaceBlock('local_tasks_block');
+  }
+
+  /**
+   * Tests the media actions (add/edit/delete).
+   */
+  public function testMediaWithOnlyOneBundle() {
+    $session = $this->getSession();
+    $page = $session->getPage();
+    $assert_session = $this->assertSession();
+
+    $bundle = $this->drupalCreateMediaType(['new_revision' => FALSE]);
+
+    $this->drupalGet('media/add');
+    $assert_session->statusCodeEquals(200);
+    $assert_session->addressEquals('media/add/' . $bundle->id());
+    $assert_session->elementNotExists('css', '#edit-revision');
+
+    // Tests media item add form.
+    $media_name = $this->randomMachineName();
+    $page->fillField('name[0][value]', $media_name);
+    $revision_log_message = $this->randomString();
+    $page->fillField('revision_log[0][value]', $revision_log_message);
+    $page->pressButton('Save and publish');
+    $media_id = $this->container->get('entity.query')->get('media')->execute();
+    $media_id = reset($media_id);
+    /** @var \Drupal\media\MediaInterface $media */
+    $media = $this->container->get('entity_type.manager')
+      ->getStorage('media')
+      ->loadUnchanged($media_id);
+    $this->assertEquals($media->getRevisionLogMessage(), $revision_log_message);
+    $assert_session->titleEquals($media->label() . ' | Drupal');
+
+    // Tests media edit form.
+    $bundle->setNewRevision(FALSE);
+    $bundle->save();
+    $media_name2 = $this->randomMachineName();
+    $this->drupalGet('media/' . $media_id . '/edit');
+    $assert_session->checkboxNotChecked('edit-revision');
+    $media_name = $this->randomMachineName();
+    $page->fillField('name[0][value]', $media_name2);
+    $page->pressButton('Save and keep published');
+    $assert_session->titleEquals($media_name2 . ' | Drupal');
+
+    // Test that there is no empty vertical tabs element, if the container is
+    // empty (see #2750697).
+    // Make the "Publisher ID" and "Created" fields hidden.
+    $this->drupalGet('/admin/structure/media/manage/' . $bundle->id() . '/form-display');
+    $page->selectFieldOption('fields[created][parent]', 'hidden');
+    $page->selectFieldOption('fields[uid][parent]', 'hidden');
+    $page->pressButton('Save');
+    // Assure we are testing with a user without permission to manage revisions.
+    $this->drupalLogin($this->nonAdminUser);
+    // Check the container is not present.
+    $this->drupalGet('media/' . $media_id . '/edit');
+    // An empty tab container would look like this.
+    $raw_html = '<div data-drupal-selector="edit-advanced" data-vertical-tabs-panes><input class="vertical-tabs__active-tab" data-drupal-selector="edit-advanced-active-tab" type="hidden" name="advanced__active_tab" value="" />' . "\n" . '</div>';
+    $assert_session->responseNotContains($raw_html);
+    // Continue testing as admin.
+    $this->drupalLogin($this->adminUser);
+
+    // Enable revisions by default.
+    $bundle->setNewRevision(TRUE);
+    $bundle->save();
+    $this->drupalGet('media/' . $media_id . '/edit');
+    $assert_session->checkboxChecked('edit-revision');
+    $page->fillField('name[0][value]', $media_name);
+    $page->fillField('revision_log[0][value]', $revision_log_message);
+    $page->pressButton('Save and keep published');
+    $assert_session->titleEquals($media_name . ' | Drupal');
+    /** @var \Drupal\media\MediaInterface $media */
+    $media = $this->container->get('entity_type.manager')
+      ->getStorage('media')
+      ->loadUnchanged($media_id);
+    $this->assertEquals($media->getRevisionLogMessage(), $revision_log_message);
+
+    // Tests media delete form.
+    $this->drupalGet('media/' . $media_id . '/edit');
+    $page->clickLink('Delete');
+    $assert_session->pageTextContains('This action cannot be undone');
+    $page->pressButton('Delete');
+    $media_id = \Drupal::entityQuery('media')->execute();
+    $this->assertFalse($media_id);
+  }
+
+  /**
+   * Tests the "media/add" and "media/mid" pages.
+   *
+   * Tests if the "media/add" page gives you a selecting option if there are
+   * multiple media bundles available.
+   */
+  public function testMediaWithMultipleBundles() {
+    $assert_session = $this->assertSession();
+
+    // Tests and creates the first media bundle.
+    $first_media_bundle = $this->drupalCreateMediaType(['description' => $this->randomMachineName(32)]);
+
+    // Test and create a second media bundle.
+    $second_media_bundle = $this->drupalCreateMediaType(['description' => $this->randomMachineName(32)]);
+
+    // Test if media/add displays two media bundle options.
+    $this->drupalGet('media/add');
+
+    // Checks for the first media bundle.
+    $assert_session->pageTextContains($first_media_bundle->label());
+    $assert_session->pageTextContains($first_media_bundle->getDescription());
+    // Checks for the second media bundle.
+    $assert_session->pageTextContains($second_media_bundle->label());
+    $assert_session->pageTextContains($second_media_bundle->getDescription());
+
+    // Continue testing media bundle filter.
+    $first_media_item = Media::create(['bundle' => $first_media_bundle->id()]);
+    $first_media_item->save();
+    $second_media_item = Media::create(['bundle' => $second_media_bundle->id()]);
+    $second_media_item->save();
+
+    // Go to first media item.
+    $this->drupalGet('media/' . $first_media_item->id());
+    $assert_session->statusCodeEquals(200);
+    $assert_session->pageTextContains($first_media_item->label());
+
+    // Go to second media item.
+    $this->drupalGet('media/' . $second_media_item->id());
+    $assert_session->statusCodeEquals(200);
+    $assert_session->pageTextContains($second_media_item->label());
+  }
+
+}
diff --git a/core/modules/media/tests/src/FunctionalJavascript/BundleCreationTest.php b/core/modules/media/tests/src/FunctionalJavascript/BundleCreationTest.php
new file mode 100644
index 0000000000000000000000000000000000000000..cc9c097497db82afb96bfb498024d8911af05347
--- /dev/null
+++ b/core/modules/media/tests/src/FunctionalJavascript/BundleCreationTest.php
@@ -0,0 +1,99 @@
+<?php
+
+namespace Drupal\Tests\media\FunctionalJavascript;
+
+/**
+ * Tests the media bundle creation.
+ *
+ * @group media
+ */
+class BundleCreationTest extends MediaJavascriptTestBase {
+
+  /**
+   * Tests the media bundle creation form.
+   */
+  public function testBundleCreationFormWithDefaultField() {
+    $label = 'Bundle with Default Field';
+    $bundleMachineName = str_replace(' ', '_', strtolower($label));
+
+    $this->drupalGet('admin/structure/media/add');
+    $page = $this->getSession()->getPage();
+
+    // Fill in a label to the bundle.
+    $page->fillField('label', $label);
+    // Wait for machine name generation. Default: waitUntilVisible(), does not
+    // work properly.
+    $this->getSession()
+      ->wait(5000, "jQuery('.machine-name-value').text() === '{$bundleMachineName}'");
+
+    // Select our test bundle type.
+    $this->assertSession()->fieldExists('Handler');
+    $this->assertSession()->optionExists('Handler', 'test');
+    $page->selectFieldOption('Handler', 'test');
+    $this->assertSession()->assertWaitOnAjaxRequest();
+
+    $page->pressButton('Save');
+
+    // Check whether the source field was correctly created.
+    $this->drupalGet("admin/structure/media/manage/{$bundleMachineName}/fields");
+
+    // Check 2nd column of first data row, to be machine name for field name.
+    $this->assertSession()
+      ->elementContains('xpath', '(//table[@id="field-overview"]//tr)[2]//td[2]', 'field_media_test');
+    // Check 3rd column of first data row, to be correct field type.
+    $this->assertSession()
+      ->elementTextContains('xpath', '(//table[@id="field-overview"]//tr)[2]//td[3]', 'Text (plain)');
+
+    // Check that the source field is correctly assigned to media bundle.
+    $this->drupalGet("admin/structure/media/manage/{$bundleMachineName}");
+
+    $this->assertSession()
+      ->fieldValueEquals('handler_configuration[test][source_field]', 'field_media_test');
+  }
+
+  /**
+   * Test creation of media bundle, reusing an existing source field.
+   */
+  public function testBundleCreationReuseSourceField() {
+    // Create a new bundle, which should create a new field we can reuse.
+    $this->drupalGet('/admin/structure/media/add');
+    $page = $this->getSession()->getPage();
+    $page->fillField('label', 'Pastafazoul');
+    $this->getSession()
+      ->wait(5000, "jQuery('.machine-name-value').text() === 'pastafazoul'");
+    $page->selectFieldOption('Handler', 'test');
+    $this->assertSession()->assertWaitOnAjaxRequest();
+    $page->pressButton('Save');
+
+    $label = 'Bundle reusing Default Field';
+    $bundleMachineName = str_replace(' ', '_', strtolower($label));
+
+    $this->drupalGet('admin/structure/media/add');
+    $page = $this->getSession()->getPage();
+
+    // Fill in a label to the bundle.
+    $page->fillField('label', $label);
+
+    // Wait for machine name generation. Default: waitUntilVisible(), does not
+    // work properly.
+    $this->getSession()
+      ->wait(5000, "jQuery('.machine-name-value').text() === '{$bundleMachineName}'");
+
+    // Select our test bundle type.
+    $this->assertSession()->fieldExists('Handler');
+    $this->assertSession()->optionExists('Handler', 'test');
+    $page->selectFieldOption('Handler', 'test');
+    $this->assertSession()->assertWaitOnAjaxRequest();
+    // Select the existing field for re-use.
+    $page->selectFieldOption('handler_configuration[test][source_field]', 'field_media_test');
+    $page->pressButton('Save');
+
+    // Check that there are not fields created.
+    $this->drupalGet("admin/structure/media/manage/{$bundleMachineName}/fields");
+    // The reused field should be present...
+    $this->assertSession()->pageTextContains('field_media_test');
+    // ...not a new, unique one.
+    $this->assertSession()->pageTextNotContains('field_media_test_1');
+  }
+
+}
diff --git a/core/modules/media/tests/src/FunctionalJavascript/FileTest.php b/core/modules/media/tests/src/FunctionalJavascript/FileTest.php
new file mode 100644
index 0000000000000000000000000000000000000000..0e4e08c35f0e30c8d3ccefe1e8fd016197aaa3b8
--- /dev/null
+++ b/core/modules/media/tests/src/FunctionalJavascript/FileTest.php
@@ -0,0 +1,50 @@
+<?php
+
+namespace Drupal\Tests\media\FunctionalJavascript;
+
+use Drupal\media\Entity\Media;
+
+/**
+ * Tests the file handler plugin.
+ *
+ * @group media
+ */
+class FileTest extends MediaHandlerTestBase {
+
+  /**
+   * Tests the file handler.
+   */
+  public function testFileHandler() {
+    $session = $this->getSession();
+    $page = $session->getPage();
+    $assert_session = $this->assertSession();
+
+    // We rely on an automatic source field being created at this point.
+    // @see MediaTypeBase::getSourceFieldName().
+    $source_field_name = 'field_media_file';
+    $bundle_name = strtolower($this->randomMachineName(12));
+    $provided_fields = ['mime', 'size'];
+    $type = $this->createMediaTypeTest($bundle_name, 'file', $provided_fields);
+    \Drupal::service('entity_field.manager')->clearCachedFieldDefinitions();
+    // Adjust the allowed extensions on the source field.
+    $this->drupalGet("admin/structure/media/manage/$bundle_name/fields/media.$bundle_name.$source_field_name");
+    $page->fillField('settings[file_extensions]', 'txt');
+    $page->pressButton('Save settings');
+    // Hide the media name to test default name generation.
+    $this->hideMediaField('name', $bundle_name);
+    // Create a media item.
+    $this->drupalGet("media/add/$bundle_name");
+    $page->attachFileToField('files[' . $source_field_name . '_0]', \Drupal::root() . '/sites/README.txt');
+    $assert_session->assertWaitOnAjaxRequest();
+    $page->pressButton('Save and publish');
+
+    $assert_session->addressEquals('media/1');
+    // Make sure the thumbnail shows up.
+    $assert_session->elementAttributeContains('css', '.image-style-thumbnail', 'src', 'generic.png');
+    // Load the media and check its default name.
+    $media = Media::load(1);
+    $this->assertEquals('README.txt', $media->label());
+
+  }
+
+}
diff --git a/core/modules/media/tests/src/FunctionalJavascript/MediaHandlerTestBase.php b/core/modules/media/tests/src/FunctionalJavascript/MediaHandlerTestBase.php
new file mode 100644
index 0000000000000000000000000000000000000000..911f33905d922e3a60909f97076353de6226693c
--- /dev/null
+++ b/core/modules/media/tests/src/FunctionalJavascript/MediaHandlerTestBase.php
@@ -0,0 +1,96 @@
+<?php
+
+namespace Drupal\Tests\media\FunctionalJavascript;
+
+use Drupal\media\Entity\MediaType;
+
+/**
+ * A base test class for plugin types.
+ */
+abstract class MediaHandlerTestBase extends MediaJavascriptTestBase {
+
+  /**
+   * Hide a component from the default form display config.
+   *
+   * @param string $field_name
+   *   The field name.
+   * @param string $type_name
+   *   The media type machine name.
+   */
+  protected function hideMediaField($field_name, $type_name) {
+    $form_display = entity_get_form_display('media', $type_name, 'default');
+    $form_display->removeComponent($field_name)->save();
+  }
+
+  /**
+   * Helper to test a generic type (bundle) creation.
+   *
+   * @param string $type_name
+   *   The type machine name.
+   * @param string $type_id
+   *   The bundle type ID.
+   * @param array $provided_fields
+   *   (optional) An array of field machine names this type provides.
+   *
+   * @return \Drupal\media\MediaTypeInterface
+   *   The type created.
+   */
+  public function createMediaTypeTest($type_name, $type_id, array $provided_fields = []) {
+    $session = $this->getSession();
+    $page = $session->getPage();
+    $assert_session = $this->assertSession();
+
+    $this->drupalGet('admin/structure/media/add');
+    $page->fillField('label', $type_name);
+    $this->assertJsCondition("jQuery('.machine-name-value').text() === '$type_name'");
+
+    // Make sure the type is available.
+    $assert_session->optionExists('handler', $type_id);
+    $page->selectFieldOption('handler', $type_id);
+    $assert_session->assertWaitOnAjaxRequest();
+
+    // Make sure the provided fields are visible on the form.
+    if (!empty($provided_fields)) {
+      foreach ($provided_fields as $provided_field) {
+        $assert_session->selectExists("field_mapping[$provided_field]");
+      }
+    }
+
+    // Save the page to create the type.
+    $page->pressButton('Save');
+    $assert_session->pageTextContains('The media type ' . $type_name . ' has been added.');
+    $this->drupalGet('admin/structure/media');
+    $assert_session->pageTextContains($type_name);
+
+    // Bundle definitions are statically cached in the context of the test, we
+    // need to make sure we have updated information before proceeding with the
+    // actions on the UI.
+    \Drupal::service('entity_type.bundle.info')->clearCachedBundles();
+
+    return MediaType::load($type_name);
+  }
+
+  /**
+   * Helper to assert presence/absence of select options.
+   *
+   * @param string $select
+   *   One of id|name|label|value for the select field.
+   * @param array $expected_options
+   *   An indexed array of expected option names.
+   * @param array $non_expected_options
+   *   An indexed array of non-expected option names.
+   *
+   * @see \Drupal\Tests\WebAssert::optionExists()
+   * @see \Drupal\Tests\WebAssert::optionNotExists()
+   */
+  protected function assertSelectOptions($select, $expected_options = [], $non_expected_options = []) {
+    $assert_session = $this->assertSession();
+    foreach ($expected_options as $expected_option) {
+      $assert_session->optionExists($select, $expected_option);
+    }
+    foreach ($non_expected_options as $non_expected_option) {
+      $assert_session->optionNotExists($select, $non_expected_option);
+    }
+  }
+
+}
diff --git a/core/modules/media/tests/src/FunctionalJavascript/MediaJavascriptTestBase.php b/core/modules/media/tests/src/FunctionalJavascript/MediaJavascriptTestBase.php
new file mode 100644
index 0000000000000000000000000000000000000000..2c1f2ccfe37d4a83b45b0fa74b216f25a42319ca
--- /dev/null
+++ b/core/modules/media/tests/src/FunctionalJavascript/MediaJavascriptTestBase.php
@@ -0,0 +1,112 @@
+<?php
+
+namespace Drupal\Tests\media\FunctionalJavascript;
+
+use Drupal\FunctionalJavascriptTests\JavascriptTestBase;
+use Drupal\Tests\media\Functional\MediaFunctionalTestTrait;
+
+/**
+ * Base class for Media functional JavaScript tests.
+ *
+ * @package Drupal\Tests\media\FunctionalJavascript
+ */
+abstract class MediaJavascriptTestBase extends JavascriptTestBase {
+
+  use MediaFunctionalTestTrait {
+    createMediaType as drupalCreateMediaType;
+  }
+
+  /**
+   * Modules to enable.
+   *
+   * @var array
+   */
+  public static $modules = [
+    'system',
+    'node',
+    'field_ui',
+    'views_ui',
+    'media',
+    'media_test_handler',
+  ];
+
+  /**
+   * Permissions for the admin user that will be logged-in for test.
+   *
+   * @var array
+   */
+  protected static $adminUserPermissions = [
+    // Media entity permissions.
+    'administer media',
+    'administer media fields',
+    'administer media form display',
+    'administer media display',
+    'administer media types',
+    'view media',
+    'create media',
+    'update media',
+    'update any media',
+    'delete media',
+    'delete any media',
+    // Other permissions.
+    'administer views',
+    'access content overview',
+    'view all revisions',
+    'administer content types',
+    'administer node fields',
+    'administer node form display',
+    'bypass node access',
+  ];
+
+  /**
+   * An admin test user account.
+   *
+   * @var \Drupal\Core\Session\AccountInterface;
+   */
+  protected $adminUser;
+
+  /**
+   * A non-admin test user account.
+   *
+   * @var \Drupal\Core\Session\AccountInterface;
+   */
+  protected $nonAdminUser;
+
+  /**
+   * The storage service.
+   *
+   * @var \Drupal\Core\Entity\EntityStorageInterface;
+   */
+  protected $storage;
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function setUp() {
+    parent::setUp();
+
+    // Have two users ready to be used in tests.
+    $this->adminUser = $this->drupalCreateUser(static::$adminUserPermissions);
+    $this->nonAdminUser = $this->drupalCreateUser([]);
+    // Start off logged in as admin.
+    $this->drupalLogin($this->adminUser);
+
+    $this->storage = $this->container->get('entity_type.manager')->getStorage('media');
+  }
+
+  /**
+   * Waits and asserts that a given element is visible.
+   *
+   * @param string $selector
+   *   The CSS selector.
+   * @param int $timeout
+   *   (Optional) Timeout in milliseconds, defaults to 1000.
+   * @param string $message
+   *   (Optional) Message to pass to assertJsCondition().
+   */
+  protected function waitUntilVisible($selector, $timeout = 1000, $message = '') {
+    $condition = "jQuery('" . $selector . ":visible').length > 0";
+    $this->assertJsCondition($condition, $timeout, $message);
+  }
+
+}
diff --git a/core/modules/media/tests/src/FunctionalJavascript/MediaUiJavascriptTest.php b/core/modules/media/tests/src/FunctionalJavascript/MediaUiJavascriptTest.php
new file mode 100644
index 0000000000000000000000000000000000000000..c732a2da657c44ed8b4cdc1d51bb593d03d1691e
--- /dev/null
+++ b/core/modules/media/tests/src/FunctionalJavascript/MediaUiJavascriptTest.php
@@ -0,0 +1,179 @@
+<?php
+
+namespace Drupal\Tests\media\FunctionalJavascript;
+
+use Drupal\media\Entity\Media;
+
+/**
+ * Ensures that media UI works correctly.
+ *
+ * @group media
+ */
+class MediaUiJavascriptTest extends MediaJavascriptTestBase {
+
+  /**
+   * Modules to enable.
+   *
+   * @var array
+   */
+  public static $modules = [
+    'block',
+    'media_test_handler',
+  ];
+
+  /**
+   * The test media type.
+   *
+   * @var \Drupal\media\MediaTypeInterface
+   */
+  protected $testBundle;
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function setUp() {
+    parent::setUp();
+    $this->drupalPlaceBlock('local_actions_block');
+    $this->drupalPlaceBlock('local_tasks_block');
+  }
+
+  /**
+   * Tests a media bundle administration.
+   */
+  public function testMediaBundles() {
+    $session = $this->getSession();
+    $page = $session->getPage();
+    $assert_session = $this->assertSession();
+
+    $this->drupalGet('admin/structure/media');
+    $assert_session->statusCodeEquals(200);
+    $assert_session->pageTextContains('No media types available. Add media type.');
+    $assert_session->linkExists('Add media type');
+
+    // Test the creation of a media bundle using the UI.
+    $name = $this->randomMachineName();
+    $description = $this->randomMachineName();
+    $this->drupalGet('admin/structure/media/add');
+    $page->fillField('label', $name);
+    $machine_name = strtolower($name);
+    $this->assertJsCondition("jQuery('.machine-name-value').html() == '$machine_name'");
+    $page->selectFieldOption('handler', 'test');
+    $this->assertJsCondition("jQuery('.form-item-handler-configuration-test-test-config-value').length > 0;");
+    $page->fillField('description', $description);
+    $page->pressButton('Save');
+    $assert_session->statusCodeEquals(200);
+    $assert_session->pageTextContains('The media type ' . $name . ' has been added.');
+    $this->drupalGet('admin/structure/media');
+    $assert_session->statusCodeEquals(200);
+    $assert_session->pageTextContains($name);
+    $assert_session->pageTextContains($description);
+
+    /** @var \Drupal\media\MediaTypeInterface $bundle_storage */
+    $bundle_storage = $this->container->get('entity_type.manager')->getStorage('media_type');
+    $this->testBundle = $bundle_storage->load(strtolower($name));
+
+    // Check if all action links exist.
+    $assert_session->linkByHrefExists('admin/structure/media/add');
+    $assert_session->linkByHrefExists('admin/structure/media/manage/' . $this->testBundle->id());
+    $assert_session->linkByHrefExists('admin/structure/media/manage/' . $this->testBundle->id() . '/fields');
+    $assert_session->linkByHrefExists('admin/structure/media/manage/' . $this->testBundle->id() . '/form-display');
+    $assert_session->linkByHrefExists('admin/structure/media/manage/' . $this->testBundle->id() . '/display');
+
+    // Assert that fields have expected values before editing.
+    $page->clickLink('Edit');
+    $assert_session->fieldValueEquals('label', $name);
+    $assert_session->fieldValueEquals('description', $description);
+    $assert_session->fieldValueEquals('handler', 'test');
+    $assert_session->fieldValueEquals('label', $name);
+    $assert_session->checkboxNotChecked('edit-options-new-revision');
+    $assert_session->checkboxChecked('edit-options-status');
+    $assert_session->checkboxNotChecked('edit-options-queue-thumbnail-downloads');
+    $assert_session->pageTextContains('Create new revision');
+    $assert_session->pageTextContains('Automatically create new revisions. Users with the Administer media permission will be able to override this option.');
+    $assert_session->pageTextContains('Download thumbnails via a queue.');
+    $assert_session->pageTextContains('Media will be automatically published when created.');
+    $assert_session->pageTextContains('Media handlers can provide metadata fields such as title, caption, size information, credits, etc. Media can automatically save this metadata information to entity fields, which can be configured below. Information will only be mapped if the entity field is empty.');
+
+    // Try to change media type and check if new configuration sub-form appears.
+    $page->selectFieldOption('handler', 'test');
+    $assert_session->assertWaitOnAjaxRequest();
+    $assert_session->fieldExists('Test config value');
+    $assert_session->fieldValueEquals('Test config value', 'This is default value.');
+    $assert_session->fieldExists('Field 1');
+    $assert_session->fieldExists('Field 2');
+
+    // Test if the edit machine name is not editable.
+    $assert_session->fieldDisabled('Machine-readable name');
+
+    // Edit and save media bundle form fields with new values.
+    $new_name = $this->randomMachineName();
+    $new_description = $this->randomMachineName();
+    $page->fillField('label', $new_name);
+    $page->fillField('description', $new_description);
+    $page->selectFieldOption('handler', 'test');
+    $page->fillField('Test config value', 'This is new config value.');
+    $page->selectFieldOption('field_mapping[field_1]', 'name');
+    $page->checkField('options[new_revision]');
+    $page->uncheckField('options[status]');
+    $page->checkField('options[queue_thumbnail_downloads]');
+    $page->pressButton('Save');
+    $assert_session->statusCodeEquals(200);
+
+    // Test if edit worked and if new field values have been saved as expected.
+    $this->drupalGet('admin/structure/media/manage/' . $this->testBundle->id());
+    $assert_session->fieldValueEquals('label', $new_name);
+    $assert_session->fieldValueEquals('description', $new_description);
+    $assert_session->fieldValueEquals('handler', 'test');
+    $assert_session->checkboxChecked('options[new_revision]');
+    $assert_session->checkboxNotChecked('options[status]');
+    $assert_session->checkboxChecked('options[queue_thumbnail_downloads]');
+    $assert_session->fieldValueEquals('Test config value', 'This is new config value.');
+    $assert_session->fieldValueEquals('Field 1', 'name');
+    $assert_session->fieldValueEquals('Field 2', '_none');
+
+    /** @var \Drupal\media\MediaTypeInterface $loaded_bundle */
+    $loaded_bundle = $this->container->get('entity_type.manager')
+      ->getStorage('media_type')
+      ->load($this->testBundle->id());
+    $this->assertEquals($loaded_bundle->id(), $this->testBundle->id());
+    $this->assertEquals($loaded_bundle->label(), $new_name);
+    $this->assertEquals($loaded_bundle->getDescription(), $new_description);
+    $this->assertEquals($loaded_bundle->getHandler()->getPluginId(), 'test');
+    $this->assertEquals($loaded_bundle->getHandler()->getConfiguration()['test_config_value'], 'This is new config value.');
+    $this->assertTrue($loaded_bundle->shouldCreateNewRevision());
+    $this->assertTrue($loaded_bundle->getQueueThumbnailDownloads());
+    $this->assertFalse($loaded_bundle->getStatus());
+    $this->assertEquals($loaded_bundle->getFieldMap(), ['field_1' => 'name']);
+
+    // We need to clear the statically cached field definitions to account for
+    // fields that have been created by API calls in this test, since they exist
+    // in a separate memory space from the web server.
+    $this->container->get('entity_field.manager')->clearCachedFieldDefinitions();
+
+    // Test that a media being created with default status to "FALSE" will be
+    // created unpublished.
+    /** @var \Drupal\media\MediaInterface $unpublished_media */
+    $unpublished_media = Media::create(['name' => 'unpublished test media', 'bundle' => $loaded_bundle->id()]);
+    $this->assertFalse($unpublished_media->isPublished());
+    $unpublished_media->delete();
+
+    // Tests media bundle delete form.
+    $page->clickLink('Delete');
+    $assert_session->addressEquals('admin/structure/media/manage/' . $this->testBundle->id() . '/delete');
+    $page->pressButton('Delete');
+    $assert_session->addressEquals('admin/structure/media');
+    $assert_session->pageTextContains('The media type ' . $new_name . ' has been deleted.');
+
+    // Test bundle delete prevention when there is existing media.
+    $bundle2 = $this->drupalCreateMediaType();
+    $label2 = $bundle2->label();
+    $media = Media::create(['name' => 'lorem ipsum', 'bundle' => $bundle2->id()]);
+    $media->save();
+    $this->drupalGet('admin/structure/media/manage/' . $bundle2->id());
+    $page->clickLink('Delete');
+    $assert_session->addressEquals('admin/structure/media/manage/' . $bundle2->id() . '/delete');
+    $assert_session->fieldNotExists('edit-submit');
+    $assert_session->pageTextContains("$label2 is used by 1 piece of content on your site. You can not remove this content type until you have removed all of the $label2 content.");
+  }
+
+}
diff --git a/core/modules/media/tests/src/FunctionalJavascript/MediaViewsWizardTest.php b/core/modules/media/tests/src/FunctionalJavascript/MediaViewsWizardTest.php
new file mode 100644
index 0000000000000000000000000000000000000000..99515a26104d087f71a14077b323d4cd4900df20
--- /dev/null
+++ b/core/modules/media/tests/src/FunctionalJavascript/MediaViewsWizardTest.php
@@ -0,0 +1,88 @@
+<?php
+
+namespace Drupal\Tests\media\FunctionalJavascript;
+
+use Drupal\views\Views;
+
+/**
+ * Tests the media entity type integration into the wizard.
+ *
+ * @group media
+ *
+ * @see \Drupal\media\Plugin\views\wizard\Media
+ * @see \Drupal\media\Plugin\views\wizard\MediaRevision
+ */
+class MediaViewsWizardTest extends MediaJavascriptTestBase {
+
+  /**
+   * Tests adding a view of media.
+   */
+  public function testMediaWizard() {
+    $session = $this->getSession();
+    $page = $session->getPage();
+    $assert_session = $this->assertSession();
+
+    $view_id = strtolower($this->randomMachineName(16));
+    $this->drupalGet('admin/structure/views/add');
+    $page->fillField('label', $view_id);
+    $this->waitUntilVisible('.machine-name-value');
+    $page->selectFieldOption('show[wizard_key]', 'media');
+    $assert_session->assertWaitOnAjaxRequest();
+    $page->checkField('page[create]');
+    $page->fillField('page[path]', $this->randomMachineName(16));
+    $page->pressButton('Save and edit');
+    $assert_session->assertWaitOnAjaxRequest();
+    $this->assertEquals($session->getCurrentUrl(), $this->baseUrl . '/admin/structure/views/view/' . $view_id);
+
+    $view = Views::getView($view_id);
+    $view->initHandlers();
+    $row = $view->display_handler->getOption('row');
+    $this->assertEquals($row['type'], 'fields');
+    // Check for the default filters.
+    $this->assertEquals($view->filter['status']->table, 'media_field_data');
+    $this->assertEquals($view->filter['status']->field, 'status');
+    $this->assertTrue($view->filter['status']->value);
+    // Check for the default fields.
+    $this->assertEquals($view->field['name']->table, 'media_field_data');
+    $this->assertEquals($view->field['name']->field, 'name');
+
+  }
+
+  /**
+   * Tests adding a view of media revisions.
+   */
+  public function testMediaRevisionWizard() {
+    $session = $this->getSession();
+    $page = $session->getPage();
+    $assert_session = $this->assertSession();
+
+    $view_id = strtolower($this->randomMachineName(16));
+    $this->drupalGet('admin/structure/views/add');
+    $page->fillField('label', $view_id);
+    $this->waitUntilVisible('.machine-name-value');
+    $page->selectFieldOption('show[wizard_key]', 'media_revision');
+    $assert_session->assertWaitOnAjaxRequest();
+    $page->checkField('page[create]');
+    $page->fillField('page[path]', $this->randomMachineName(16));
+    $page->pressButton('Save and edit');
+    $assert_session->assertWaitOnAjaxRequest();
+    $this->assertEquals($session->getCurrentUrl(), $this->baseUrl . '/admin/structure/views/view/' . $view_id);
+
+    $view = Views::getView($view_id);
+    $view->initHandlers();
+    $row = $view->display_handler->getOption('row');
+    $this->assertEquals($row['type'], 'fields');
+
+    // Check for the default filters.
+    $this->assertEquals($view->filter['status']->table, 'media_field_revision');
+    $this->assertEquals($view->filter['status']->field, 'status');
+    $this->assertTrue($view->filter['status']->value);
+
+    // Check for the default fields.
+    $this->assertEquals($view->field['name']->table, 'media_field_revision');
+    $this->assertEquals($view->field['name']->field, 'name');
+    $this->assertEquals($view->field['changed']->table, 'media_field_revision');
+    $this->assertEquals($view->field['changed']->field, 'changed');
+  }
+
+}
diff --git a/core/modules/media/tests/src/Kernel/BasicCreationTest.php b/core/modules/media/tests/src/Kernel/BasicCreationTest.php
new file mode 100644
index 0000000000000000000000000000000000000000..0dceb0526e99d8b5029013206eae4f2bda368b19
--- /dev/null
+++ b/core/modules/media/tests/src/Kernel/BasicCreationTest.php
@@ -0,0 +1,157 @@
+<?php
+
+namespace Drupal\Tests\media\Kernel;
+
+use Drupal\field\Entity\FieldConfig;
+use Drupal\KernelTests\KernelTestBase;
+use Drupal\media\Entity\Media;
+use Drupal\media\Entity\MediaType;
+use Drupal\media\MediaInterface;
+use Drupal\media\MediaTypeInterface;
+
+/**
+ * Tests creation of Media Bundles and Media Entities.
+ *
+ * @group media
+ */
+class BasicCreationTest extends KernelTestBase {
+
+  /**
+   * Modules to install.
+   *
+   * @var array
+   */
+  public static $modules = [
+    'media',
+    'media_test_handler',
+    'image',
+    'user',
+    'field',
+    'system',
+    'file',
+  ];
+
+  /**
+   * The test media type.
+   *
+   * @var \Drupal\media\MediaTypeInterface
+   */
+  protected $testBundle;
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function setUp() {
+    parent::setUp();
+
+    $this->installEntitySchema('user');
+    $this->installEntitySchema('file');
+    $this->installSchema('file', 'file_usage');
+    $this->installEntitySchema('media');
+    $this->installConfig(['field', 'system', 'image', 'file']);
+
+    // Create a test bundle.
+    $id = strtolower($this->randomMachineName());
+    $this->testBundle = MediaType::create([
+      'id' => $id,
+      'label' => $id,
+      'handler' => 'test',
+      'new_revision' => FALSE,
+    ]);
+    $this->testBundle->save();
+  }
+
+  /**
+   * Tests creating a media bundle programmatically.
+   */
+  public function testMediaBundleCreation() {
+    $bundle_storage = $this->container->get('entity_type.manager')->getStorage('media_type');
+
+    $this->assertInstanceOf(MediaTypeInterface::class, MediaType::load($this->testBundle->id()), 'The new media type has not been correctly created in the database.');
+
+    // Test a media type created from default configuration.
+    $this->container->get('module_installer')->install(['media_test_type']);
+    $test_bundle = $bundle_storage->load('test');
+    $this->assertInstanceOf(MediaTypeInterface::class, $test_bundle, 'The media type from default configuration has not been created in the database.');
+    $this->assertEquals('Test type', $test_bundle->get('label'), 'Could not assure the correct type name.');
+    $this->assertEquals('Test type.', $test_bundle->get('description'), 'Could not assure the correct type description.');
+    $this->assertEquals('test', $test_bundle->get('handler'), 'Could not assure the correct handler.');
+    $this->assertEquals(['source_field' => 'field_media_test_1', 'test_config_value' => 'Kakec'], $test_bundle->get('handler_configuration'), 'Could not assure the correct handler configuration.');
+    $this->assertEquals([], $test_bundle->get('field_map'), 'Could not assure the correct field map.');
+  }
+
+  /**
+   * Tests creating a media entity programmatically.
+   */
+  public function testMediaEntityCreation() {
+    $media = Media::create([
+      'bundle' => $this->testBundle->id(),
+      'name' => 'Unnamed',
+    ]);
+    $media->save();
+
+    $this->assertNotInstanceOf(MediaInterface::class, Media::load(rand(1000, 9999)), 'Failed asserting a non-existent media.');
+
+    $this->assertInstanceOf(MediaInterface::class, Media::load($media->id()), 'The new media entity has not been created in the database.');
+    $this->assertEquals($this->testBundle->id(), $media->bundle(), 'The media was not created with the correct type.');
+    $this->assertEquals('Unnamed', $media->label(), 'The media was not created with the correct name.');
+
+    // Test the creation of a media without user-defined label and check if a
+    // default name is provided.
+    $media = Media::create([
+      'bundle' => $this->testBundle->id(),
+    ]);
+    $media->save();
+    $expected_name = 'media' . ':' . $this->testBundle->id() . ':' . $media->uuid();
+    $this->assertEquals($this->testBundle->id(), $media->bundle(), 'The media was not created with correct type.');
+    $this->assertEquals($expected_name, $media->label(), 'The media was not created with a default name.');
+  }
+
+  /**
+   * Tests creating and updating bundles programmatically.
+   */
+  public function testProgrammaticBundleManipulation() {
+    // Creating a bundle programmatically without specifying a source field
+    // should create one automagically.
+    /** @var FieldConfig $field */
+    $field = $this->testBundle->getHandler()->getSourceField($this->testBundle);
+    $this->assertInstanceOf(FieldConfig::class, $field);
+    $this->assertEquals('field_media_test', $field->getName());
+    $this->assertFalse($field->isNew());
+
+    // Saving with a non-existent source field should create it.
+    $this->testBundle->setHandlerConfiguration([
+      'source_field' => 'field_magick',
+    ]);
+    $this->testBundle->save();
+    $field = $this->testBundle->getHandler()->getSourceField($this->testBundle);
+    $this->assertInstanceOf(FieldConfig::class, $field);
+    $this->assertEquals('field_magick', $field->getName());
+    $this->assertFalse($field->isNew());
+
+    // Trying to save without a source field should create a new, de-duped one.
+    $this->testBundle->setHandlerConfiguration([]);
+    $this->testBundle->save();
+    $field = $this->testBundle->getHandler()->getSourceField($this->testBundle);
+    $this->assertInstanceOf(FieldConfig::class, $field);
+    $this->assertEquals('field_media_test_1', $field->getName());
+    $this->assertFalse($field->isNew());
+
+    // Trying to reuse an existing field should, well, reuse the existing field.
+    $this->testBundle->setHandlerConfiguration([
+      'source_field' => 'field_magick',
+    ]);
+    $this->testBundle->save();
+    $field = $this->testBundle->getHandler()->getSourceField($this->testBundle);
+    $this->assertInstanceOf(FieldConfig::class, $field);
+    $this->assertEquals('field_magick', $field->getName());
+    $this->assertFalse($field->isNew());
+    // No new de-duped fields should have been created.
+    $duplicates = FieldConfig::loadMultiple([
+      'media.' . $this->testBundle->id() . '.field_magick_1',
+      'media.' . $this->testBundle->id() . '.field_media_generic_2',
+    ]);
+    $this->assertEmpty($duplicates);
+  }
+
+}
diff --git a/core/modules/media/tests/src/Kernel/TokensTest.php b/core/modules/media/tests/src/Kernel/TokensTest.php
new file mode 100644
index 0000000000000000000000000000000000000000..e5e510cc139fb095720379baae164ba784995584
--- /dev/null
+++ b/core/modules/media/tests/src/Kernel/TokensTest.php
@@ -0,0 +1,74 @@
+<?php
+
+namespace Drupal\Tests\media\Kernel;
+
+use Drupal\Core\Language\Language;
+use Drupal\KernelTests\Core\Entity\EntityKernelTestBase;
+use Drupal\media\Entity\Media;
+use Drupal\media\Entity\MediaType;
+
+/**
+ * Tests token handling.
+ *
+ * @group media
+ */
+class TokensTest extends EntityKernelTestBase {
+
+  /**
+   * {@inheritdoc}
+   */
+  public static $modules = [
+    'media',
+    'media_test_handler',
+    'path',
+    'file',
+    'image',
+    'datetime',
+    'language',
+  ];
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function setUp() {
+    parent::setUp();
+    $this->installEntitySchema('file');
+    $this->installSchema('file', 'file_usage');
+    $this->installEntitySchema('media');
+    $this->installConfig(['language', 'datetime', 'field', 'system']);
+  }
+
+  /**
+   * Tests some of the tokens provided by Media.
+   */
+  public function testMediaEntityTokens() {
+    // Create a test media bundle.
+    $bundle_name = $this->randomMachineName();
+
+    MediaType::create([
+      'id' => $bundle_name,
+      'label' => $bundle_name,
+      'handler' => 'test',
+      'handler_configuration' => ['test_config_value' => 'Kakec'],
+      'field_map' => [],
+      'status' => 1,
+      'new_revision' => FALSE,
+    ])->save();
+
+    // Create a media entity.
+    $media = Media::create([
+      'name' => $this->randomMachineName(),
+      'bundle' => $bundle_name,
+      'uid' => '1',
+      'langcode' => Language::LANGCODE_DEFAULT,
+      'status' => TRUE,
+    ]);
+    $media->save();
+
+    $token_service = $this->container->get('token');
+
+    $replaced_value = $token_service->replace('[media:name]', ['media' => $media]);
+    $this->assertEquals($media->label(), $replaced_value, 'Token replacement for the media label was successful.');
+  }
+
+}
diff --git a/core/profiles/standard/config/optional/field.field.media.file.field_media_file.yml b/core/profiles/standard/config/optional/field.field.media.file.field_media_file.yml
new file mode 100644
index 0000000000000000000000000000000000000000..acf82c70d7804c729d83bc4260ef874fe76d99f1
--- /dev/null
+++ b/core/profiles/standard/config/optional/field.field.media.file.field_media_file.yml
@@ -0,0 +1,29 @@
+langcode: en
+status: true
+dependencies:
+  config:
+    - field.storage.media.field_media_file
+    - media.bundle.file
+  module:
+    - file
+  enforced:
+    module:
+      - media
+id: media.file.field_media_file
+field_name: field_media_file
+entity_type: media
+bundle: file
+label: File
+description: ''
+required: true
+translatable: true
+default_value: {  }
+default_value_callback: ''
+settings:
+  file_directory: '[date:custom:Y]-[date:custom:m]'
+  file_extensions: 'txt pdf'
+  max_filesize: ''
+  handler: 'default:file'
+  handler_settings: {  }
+  description_field: false
+field_type: file
diff --git a/core/profiles/standard/config/optional/field.storage.media.field_media_file.yml b/core/profiles/standard/config/optional/field.storage.media.field_media_file.yml
new file mode 100644
index 0000000000000000000000000000000000000000..a830fa89c4f32650c925b2ba026703e49d086345
--- /dev/null
+++ b/core/profiles/standard/config/optional/field.storage.media.field_media_file.yml
@@ -0,0 +1,25 @@
+langcode: en
+status: true
+dependencies:
+  module:
+    - file
+    - media
+  enforced:
+    module:
+      - media
+id: media.field_media_file
+field_name: field_media_file
+entity_type: media
+type: file
+settings:
+  uri_scheme: public
+  target_type: file
+  display_field: false
+  display_default: false
+module: file
+locked: false
+cardinality: 1
+translatable: true
+indexes: { }
+persist_with_no_fields: false
+custom_storage: false
diff --git a/core/profiles/standard/config/optional/media.type.file.yml b/core/profiles/standard/config/optional/media.type.file.yml
new file mode 100644
index 0000000000000000000000000000000000000000..ec38e0fd7ecf5d34a4b6efc1278f1fe555c25117
--- /dev/null
+++ b/core/profiles/standard/config/optional/media.type.file.yml
@@ -0,0 +1,14 @@
+langcode: en
+status: true
+dependencies:
+  module:
+    - media
+id: file
+label: File
+description: 'Use the "File" media type for uploading local files.'
+handler: file
+queue_thumbnail_downloads: false
+new_revision: false
+handler_configuration:
+  source_field: field_media_file
+field_map: { }
diff --git a/core/themes/classy/templates/content/media.html.twig b/core/themes/classy/templates/content/media.html.twig
new file mode 100644
index 0000000000000000000000000000000000000000..831a3e62ca3be068b03058cbe21902e72c692f2c
--- /dev/null
+++ b/core/themes/classy/templates/content/media.html.twig
@@ -0,0 +1,27 @@
+{#
+/**
+ * @file
+ * Theme override to display a media.
+ *
+ * Available variables:
+ * - name: Name of the media.
+ * - content: Media content.
+ *
+ * @see template_preprocess_media()
+ *
+ * @ingroup themeable
+ */
+#}
+{%
+  set classes = [
+    'media',
+    'media--type-' ~ media.bundle()|clean_class,
+    not media.isPublished() ? 'media--unpublished',
+    view_mode ? 'media--view-mode-' ~ view_mode.id()|clean_class,
+  ]
+%}
+<article{{ attributes.addClass(classes) }}>
+  {% if content %}
+    {{ content }}
+  {% endif %}
+</article>
diff --git a/core/themes/stable/templates/content/media.html.twig b/core/themes/stable/templates/content/media.html.twig
new file mode 100644
index 0000000000000000000000000000000000000000..2bdd59e9604799b8b73372000217390d1143cebc
--- /dev/null
+++ b/core/themes/stable/templates/content/media.html.twig
@@ -0,0 +1,19 @@
+{#
+/**
+ * @file
+ * Theme override to display a media.
+ *
+ * Available variables:
+ * - name: Name of the media.
+ * - content: Media content.
+ *
+ * @see template_preprocess_media()
+ *
+ * @ingroup themeable
+ */
+#}
+<article{{ attributes }}>
+  {% if content %}
+    {{ content }}
+  {% endif %}
+</article>
