Adam G-H
--- a/core/modules/media/config/schema/media.schema.yml
+++ b/core/modules/media/config/schema/media.schema.yml
      sequence:
        type: string
        label: 'View mode'
+    default_view_mode_9301:
--- a/core/modules/media/src/Form/EditorMediaDialog.php
+++ b/core/modules/media/src/Form/EditorMediaDialog.php
      return NULL;
    }

-    $filter_default_view_mode = $media_embed_filter->settings['default_view_mode'];
+    $filter_default_view_mode = $media_embed_filter->settings['default_view_mode_9301'];
--- a/core/modules/media/src/Plugin/Filter/MediaEmbed.php
+++ b/core/modules/media/src/Plugin/Filter/MediaEmbed.php
      '#element_validate' => [[static::class, 'validateOptions']],
    ];

+    $form['default_view_mode_9301'] = [
--- a/core/modules/media/src/Plugin/Filter/MediaEmbed.php
+++ b/core/modules/media/src/Plugin/Filter/MediaEmbed.php
    foreach ($xpath->query('//drupal-media[@data-entity-type="media" and normalize-space(@data-entity-uuid)!=""]') as $node) {
      /** @var \DOMElement $node */
      $uuid = $node->getAttribute('data-entity-uuid');
-      $view_mode_id = $node->getAttribute('data-view-mode') ?: $this->settings['default_view_mode'];
+      $view_mode_id = $node->getAttribute('data-view-mode') ?: $this->settings['default_view_mode_9301'];