I dont know about you, but I am a KDE-man!
Therefore I use Kaffeine.
Install:
kaffeine (I use 0.6-1)
kaffeine-mozilla (I use 0.4.3.1-1)
I have tried that with the packages provided by debian sarge. Kaffeine only opens a black window and I have found no way to make it playing the file until yet.
Flori