I love Blip.fm and I like the idea of sharing favorite videos from TV as well. I think it's a stretch for extensive use in the classroom, but it is an option in some cases.
What you can do with us
Upload as many videos as you want-you get nearly unlimited space with ViddlerRecord videos directly to the site using your webcam!Post comments and tags at specific points in the videoShare your videos with RSS and iTunesKeep your money! We are 100% free!
From Free Technology for Teachers, "FORA.tv is similar to Big Think in that it presents videos relevant to topics in the news and in the public conscious today. The videos feature well known personalities and experts talking about the important issues of the day. You will also videos of debates, press conferences, and public meetings."
From Free Technology for Teachers, "Big Think is a video website containing expert commentary on a wide range of issues and ideas. The experts featured on Big Think really are experts in their fields. Harvard Professors, editors of major news publications, politicians, and other recognized authorities offer their commentary on various issues and ideas. Registered users of Big Think can comment on and discuss the videos or post an idea to have others discuss."
Enough said!
It's from CNN a respected news source and it is geared toward students. A quick look around found topics ranging from politics to sports to hurricanes.