I was sent this link today and this site appears to be YouTube for teachers. The concept is the same but this site is only for sharing educational video clips. It is free and well designed, okay, it pretty much mirrors YouTube. I like the idea of an educational YouTube so you should check it out. It is still very new, started in January, but there are many videos on it already.
Features that I like are the flag for reporting inappropriate material and you can embed the video clips into your only courseware. It is all Flash based, like the others, so it is easy to share links to your students. I also like the guidance and position about posting copyright materials. This will help us feel confident that in using the clips from the site, we are not violating anyone's copyright.
So, this site will be as good as we make it by posting our video clips to it. Check it out at http://www.teachertube.com/