diff -up wordpress/wp-includes/js/mediaelement/mediaelement-and-player.js.no wordpress/wp-includes/js/mediaelement/mediaelement-and-player.js
--- wordpress/wp-includes/js/mediaelement/mediaelement-and-player.js.no	2020-09-29 17:53:06.000000000 +0200
+++ wordpress/wp-includes/js/mediaelement/mediaelement-and-player.js	2020-12-09 09:44:27.954254919 +0100
@@ -6135,6 +6135,7 @@ if (hasFlash) {
 		}
 	});
 
+/* swf files removed from RPM
 	var FlashMediaElementVideoRenderer = {
 		name: 'flash_video',
 		options: {
@@ -6219,6 +6220,7 @@ if (hasFlash) {
 		create: FlashMediaElementRenderer.create
 	};
 	_renderer.renderer.add(FlashMediaElementAudioOggRenderer);
+*/
 }
 
 },{"2":2,"25":25,"27":27,"28":28,"3":3,"5":5,"7":7,"8":8}],21:[function(_dereq_,module,exports){
diff -up wordpress/wp-includes/js/mediaelement/mediaelement.js.no wordpress/wp-includes/js/mediaelement/mediaelement.js
--- wordpress/wp-includes/js/mediaelement/mediaelement.js.no	2020-09-29 17:53:06.000000000 +0200
+++ wordpress/wp-includes/js/mediaelement/mediaelement.js	2020-12-09 09:44:38.532227178 +0100
@@ -1842,6 +1842,7 @@ if (hasFlash) {
 		}
 	});
 
+/* swf files removed from RPM
 	var FlashMediaElementVideoRenderer = {
 		name: 'flash_video',
 		options: {
@@ -1926,6 +1927,7 @@ if (hasFlash) {
 		create: FlashMediaElementRenderer.create
 	};
 	_renderer.renderer.add(FlashMediaElementAudioOggRenderer);
+*/
 }
 
 },{"16":16,"18":18,"19":19,"2":2,"3":3,"5":5,"7":7,"8":8}],12:[function(_dereq_,module,exports){