Comment 44 for bug 459423

The youtube plugin does not need to be disabled, it needs to be fixed and it can't be that difficult as for example minitube also still works. Until this issue is fixed I recommend everybody to use firefox+greasemonkey plugin + this script :
http://userscripts.org/scripts/show/50771

it works like a charm, and takes much less cpu than flash as it streams the .mp4 files directly and plays them with gstreamer, mplayer or whatever decoding libraries you installed...