Ticket #49852: 49852.6.patch

src/wp-admin/includes/class-wp-media-list-table.php

@@ -425 +425 @@
         public function column_title( $post ) {
                 list( $mime ) = explode( '/', $post->post_mime_type );
 
+                $attachment_id = $post->ID;
+
+                if ( 'video' === $mime || 'audio' === $mime ) {
+                        $thumbnail_id = get_post_thumbnail_id( $post->ID );
+
+                        if ( ! empty( $thumbnail_id ) ) {
+                                $attachment_id = $thumbnail_id;
+                        }
+                }
+
                 $title      = _draft_or_post_title();
-                $thumb      = wp_get_attachment_image( $post->ID, array( 60, 60 ), true, array( 'alt' => '' ) );
+                $thumb      = wp_get_attachment_image( $attachment_id, array( 60, 60 ), true, array( 'alt' => '' ) );
                 $link_start = '';
                 $link_end   = '';