Video Websites

It's been a long time since a post, but hopefully a few of you who still read will have some ideas.

My current high school has a block on nearly all online video sites (Youtube, Yahoo! video, Google video, etc) that even teachers cannot override. I have had to dance around trying to find good videos that are current (sorry library). A great source for my government class is PBS's Frontline series, which provides some fantastic, professional videos on a variety of subjects.

Any good recommendations for other programs that have video online? I have used some OPB programs as well as public radio, but any specific recommendations would be great. Thanks!