schooltube.com

Rosalind (Family Circle October 17, 2009) recommends this site. Parents, kids and educators can use it to showcase all kinds of material: student-created videos, recent sports events, school events or class activities. It's not firewalled on school campuses and all content is "vetted" by the company before it goes live, so it's safe. School can create its own channel!
School Tube.com