A trailer for the upcoming Captain America sequel, which looks pretty good. Boost it to 1080p and fullscreen for maximal enjoyousness:
Also, here’s the latest clip from the even-sooner-upcoming Thor sequel. (I don’t recommend fullscreen for this one; even at 720p the resolution doesn’t look that great.)
And here’s the trailer for the Doctor Who 50th anniversary; 1080p/fullscreen recommended again. All previous Doctors are glimpsable in the trailer, though some are easier to notice than others.