Ruliweb put online this long multiplayer video of Halo 2. Since I'm sick and tired of the Zanzibar videos I can't be 100% sure this video is new or not, so I'm counting on you to tell me :)
Update : Well the video is almost new. About 30 seconds of this footage had been released by Bungie at E3, but the rest is brand new. Since it's Bungie people playing they really know what they are doing and actually do a lot of silly things. I think (except for the quality) this is the best Zanzibar video to date. If you want me to reencode the video so it's less dark just ask.
Update 2: This time this should be better. I've (again) reencoded the video, it should look brighter and a bit sharper. And without the old E3 2003 footage.
Update 3: Added another video from the showfloor. Not really that interesting...