vivaldi-codecs-ffmpeg-extra (Extra ffmpeg codecs for Vivaldi browser).

Extra ffmpeg codecs for Vivaldi browser.

This will add H.264 support to Vivaldi and not replacing the default
/opt/vivaldi/lib/libffmpeg.so.

To test, go to
https://help.vivaldi.com/article/html5-proprietary-media-on-linux/#test

To test support of encrypted proprietary media, go to
https://demo.castlabs.com
and play the videos that are tagged with both "DRM" and "H.264".