Ticket #49852: 49852.4.patch

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

@@ -380 +380 @@
         public function column_title( $post ) {
                 list( $mime ) = explode( '/', $post->post_mime_type );
 
+                $attachment_id = $post->ID;
+                
+                if($mime == 'video' || $mime == 'audio'){
+                        $thumbnail_id = get_post_thumbnail_id($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   = '';