diff --git a/src/Plugin/Field/FieldType/YouTubeItem.php b/src/Plugin/Field/FieldType/YouTubeItem.php
index c58b8cf..0364ec1 100644
--- a/src/Plugin/Field/FieldType/YouTubeItem.php
+++ b/src/Plugin/Field/FieldType/YouTubeItem.php
@@ -75,4 +75,10 @@ class YouTubeItem extends FieldItemBase {
     return $value === NULL || $value === '';
   }
 
+  /**
+   * {@inheritdoc}
+   */
+  public static function mainPropertyName() {
+    return 'input';
+  }
 }