> My understanding is that gstreamer0.10-ffmpeg has been replaced by > gstreamer1.0-libav in Jessie, so I've installed that instead. > about:config shows that media.gstreamer.enabled is set to true. > Unfortunately, https://www.youtube.com/html5 still insists that H.264 is > not supported by my browser (both in a regular and in a -safe-mode instance).
If I'm not mistaken, the one you need is actually gstreamer1.0-plugins-bad which includes in the "Gstreamer-Decoders" section the "video/x-h264" mime.
