The vision behind WatchKnowLearn.org is simple: To provide a world-class, online domain on which educators can store, categorize, and rate the best, K – 12 educational videos on the Internet today. And to make this service FREE so teachers, parents and students everywhere may have access to those videos.
WatchKnowLearn has indexed approximately 50,000 educational videos, placing them into a directory of over 5,000 categories. The videos are available without any registration or fees to teachers in the classroom, as well as parents and students at home. Video titles, descriptions, age level information, and ratings are all edited for usefulness. Users can dive into the innovative directory or search for videos by subject and age level.
NOTE: WatchKnowLearn does not itself host videos, but serves as a library for links to excellent educational videos from YouTube, TeacherTube, SchoolTube, Vimeo, Hulu, Internet Archive, National Geographic, and more. WatchKnowLearn has a dedicated team of educators and editors who select and provide oversight of the videos.
P.S. They even have a collection of homeschool videos!