Well I found my problem. It turns out there's a 20 minute limit on videos that I didn't see. Videos work fine after you split them up.

Regardless, some kind of error message would have been nice instead of indefinite processing. =)

A bunch of videos that I've tried to upload get stuck in the processing queue. Has anybody had any luck getting such videos to work? Maybe reconverting to a lossless codec and converting back again?