I was wondering, would it be possible to put a field for video length? Sometimes I'm in the mood for different video lengths, and it'd be nice to just browse specifically for that time length. (Is it weird that I want that? Hmm.)

Anyways, I was thinking it could be a pull-down menu-type thing. My suggestion for lengths allowed in the menu are:
< 10 seconds, 10 seconds - 1 minute, 1-5 minutes, 5-10 minutes, 10-20 minutes, > 20 minutes.

Alternatively, you could just make a small text field where the submitter would input the exact time.