Drupal 8.x

I have ten custom List (integer) Fields, each has 5 values to choose from on the list. Within my Twig configuration I've been programmatically using {% if node.field_options.value == 'X' %} to display some CSS and an Image based on value returned.

Performance wise, is there anything wrong with doing this or will it slow down rendering of the page?

Hello,

Drupal 8 has in-built Media module in core;

= but I cannot find - How to insert an Image from this Media library into Image field or Text field....

How?! I do not see a Media widget or option; How to operate with it?!

p.s. and is there any option to Embed fielded Media into Node Text editor field?!

Something I've encountered from time to time is, I'll get a message that says something about it can't find the update information and gives me a link to run Cron. I'm logged in, with Admin privileges, however most times (not always) when I click the "Run Cron" link, the system "sits and thinks" for a bit, and then gives me a message which says:

Access Denied 

You are not authorized to access this page

However, if I click Configuration > System > Cron

I tried something new recently. I attempted to use tokens in some of my displays, rather than static text.

For example, in the footer, instead of "hard coding" 

"Copyright © 2019 SiteName"

I attempted to use the token to display the configured site name, and I entered

"© Copyright [site:name]."

Expecting to have the name entered in the configuration display. Instead, when I view the site in my browser, I see "[site:name]" just as I had entered.

Where is the option to change the Progress indicator on an Image Field from Throbber to Bar?

I've looked all over in ../admin/structure/types/manage/review/form-display

I had for some while ago PHP 5.6 and I installed Drupal 8 and it was working.... later, I changed PHP to 7.033 and was still working on my site.... and now, I changed back to PHP 5.6 - and when I visited my Drupal 8 - all pages were blank...

... but if I change php to 7.0 again - it is working.....

Is this a grave problem or not?!  Any solutions?