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. For tests, go to: * https://html5test.com * https://www.youtube.com/html5 * http://www.quirksmode.org/html5/tests/video.html