Ticket #42643: 42643.3.patch

src/wp-includes/js/mediaelement/wp-mediaelement.js

@@ -44 +44 @@
                                 }
                         };
 
+                        /**
+                         * Custom error handler.
+                         *
+                         * Sets up a custom error handler in case a video render fails, and provides a download
+                         * link as the fallback.
+                         *
+                         * @since 4.9.2
+                         *
+                         * @param {object} media The wrapper that mimics all the native events/properties/methods for all renderers.
+                         * @param {object} node  The original HTML video, audio or iframe tag where the media was loaded originally.
+                         *
+                         * @returns {string}
+                         */
+                        settings.customError = function ( media, node ) {
+                                // Make sure we only fall back to a download link for flash files.
+                                if ( -1 !== media.rendererName.indexOf( 'flash' ) || -1 !== media.rendererName.indexOf( 'flv' ) ) {
+                                        return '<a href="' + node.src + '">Download ' + node.src.substring( node.src.lastIndexOf( '/' ) + 1 ) + '</a>';
+                                }
+                        };
+
                         // Only initialize new media elements.
                         $( '.wp-audio-shortcode, .wp-video-shortcode' )
                                 .not( '.mejs-container' )