Academic Earth
Annenberg Learner
Audioboom
Big Think
Bright Storm
Cosmo Learning
Gooru Learning
Howcast
Intute
Khan Academy
Metacafe
MIT Videos
NeoK12
SchoolTube
Stanford Encyclopedia of Philosophy
Stumbleupon
Teacher Tube
TED
United States National Archives
Videojug
Video Lectures
Watch Know Learn
Wonder How To
YouTube – Education
YouTube – VSauce
YouTube – Research Channel