ARRRR, this trailer has so many awesomely subtle things to spot!
The explodey car thing is a kill streak, you can see that at 0:25
After he stabs the two guy at 0:30, you can see another camera on a tripod (which the game calls a "Camera Spike")to the left, but this one has a red light instead of a green light. What does that mean!?!?!?!?!
It shows that the map with the missile on it is called "Launch" in the cinema editor.
EDIT: And lastly, you can see that when the sniper dies, he doesn't have ghillie suit, that's a pretty stupid observation I suppose, but an observation none the less!