I am not a Halo fan, though that has more to do with its community than the games themselves. And if there's one thing I can appreciate of Halo, its the live-action trailers. Though this goes far beyond that.
Forward unto Dawn is a 4 part mini-series that follows a group of cadets, just before the events of the first Halo game. The way the show is set up reminds me a lot of Battlestar Galactica, in the way that it focuses more on character development than pure action (though the action scenes are breathtakingly beautiful, especially in episode 3). Even if you don't like Halo, or hell, even hate it, I'd still recommend you'd at least try it.Episode 1Episode 2Episode 3