xbox xbox360 360 h.264 h264 videos
The answer is yes.
" The Spring 2007 Dashboard update for the Xbox 360 adds H.264 playback support. H.264 is a very advanced video codec used in Blu-ray/HD DVD, and offers better quality and smaller file sizes than DivX/XviD, at the cost of slightly more processing power (and encoding time).
Processing power becomes less of an issue with the powerful Xbox 360, and since the Xbox 360 does not support DivX/XviD (and is unlikely to do so), H.264 then becomes an ideal format for those that don't want to use WMV."