With real game footage! Cor, imagine a trailer that actually showed you what the game engine looked like as someone played it. I know, it's a radical idea, but Relic have gone and done it. It also reveals one of the other races that will come with the game, and let's just say that they're not exactly shattering the mould with this one.
I give this trailer a pat on the back, but explain to its parents that it could do better.