The new season 4 of Red vs. Blue has begun! If you haven't seen it, it's definently worth checking out. Very funny stuff! you can find thier videos to download at redvsblue.com.
There is adult language used, so be advised. The newest episode is #58, or you can download old episodes that are on a weekly rotation. Become a sponsor (like me) and you can get any of the videos whenever you want.
What is it? Basicly an animated sit-com, but instead of using cartoons or CGI, they use Halo and Halo 2 multiplayer to animate thier characters. Then add voices which really make the series shine. This is was got me into Halo in the first place.