I can't express how deeply I don't care about which video player I use. If I can get one of them to do everything reliably, I'll stick to it and dump the rest, but I suspect that isn't possible.
Yea, that was why I've always used mplayer-plugin since it was always the only player that worked with everything (at least with a merged collection of illegal, immoral, riaa blood pressure raising, copyright violating codecs from around the world and a 32 bit mplayer :-)