I've always liked this one. It's such a simple concept with a camera panning around different elaborate dioramas, but it really nails the style and the essence of the game. It's too bad this came out before the 4K days, this would look absolutely phenomenal in a higher resolution.
Second pick would be the trailer for Mirror's Edge's first unveiling. That theme song still fits like a glove and it's such a good representation of what the game is about, showing off a bit of raw, unedited parkour, how they use colour as a main tool for building different moods and scenarios and just the general sense of freedom and independance it's going for with its storyline. I don't think there has ever been a trailer that impressed me more than this.
I also just noticed that both have zero voice over or dialogue snippets, which gives everything else you see and hear more room to breathe.