Merge pull request #1652 from handellm/mp4_support

getusermedia/record: add supported MP4 mime types.

Author: Orphis

src/content/getusermedia/record/js/main.js

@@ -73,8 +73,10 @@ function getSupportedMimeTypes() {
     'video/webm;codecs=vp9,opus',
     'video/webm;codecs=vp8,opus',
     'video/webm;codecs=h264,opus',
-    'video/mp4;codecs=h264,aac',
     'video/webm;codecs=av01,opus',
+    'video/mp4;codecs=h264,aac',
+    'video/mp4;codecs=avc1,mp4a.40.2',
+    'video/mp4',
   ];
   return possibleTypes.filter(mimeType => {
     return MediaRecorder.isTypeSupported(mimeType);