You tube can be a great teaching tool. It is amazing what you can find. I have a google alert set to "economists assessment' which has caught some interesting things. One of the more interesting is about inflation in China from a decidedly non economic blog.
At the AEA poster session, Dirk Mateer, Penn State University, showcased his you tube site "Teaching Economics With You Tube." At the conference, just days ago, he had 20 subscribers, as of today he has 34 and 1,900 views. I highly support this site and hope that many others add to it or provide links to their video content as well.
"Teaching with You Tube: An Economist's Guide to Free Web-Based Content"
AEA/CEE Poster Session, Janyary 5, 2008 (G. Dirk Mateer)