Science teachers: Here is a great resource for you and your students! A periodic table of the elements that has a video for every element. Even better, the students are likely to get a kick out of the Einstein-haired scientist introducing the videos! The site also provides special featured videos.
The videos are hosted through you tube, but if you scroll down the page, there is an option to go to their other server that has the videos there as well. No worry about filtering issues.
How do you envision using these videos in your classroom?