SafeShare TV is a new (beta) site that I heard about from the great blog, Free Technology 4 Teachers. All you have to do is enter a You Tube URL into the SafeShare window and click generate safe link. It then takes you to your video inside a nice secure area w/ no comments. Also, you have the ability to crop the video and share it as well.
This really is an a excellent resource for schools!!!
Give SafeShare a try by clicking here.