Web address: http://pbskids.org/video/
If any TV is good for kids it would have to be PBS TV. You can get great information, content and effective teaching strategies all in the videos from PBS. Now, you can get them a la carte. PBS Kids video area allows you to watch some of your favorite children's video live on the web.
If you are a Utah Educator you can also visit eMedia to find full length versions of some of the PBS video content.