PBShttp://video.pbs.org - award-winning national programming and locally produced shows presented through on–demand streaming using the llatest version of Flash.
Snag Learning - http://learning.snagfilms.com/film "award-winning library of over 1,600 documentaries that are appropriate for students from middle school and up. Our titles cover nearly every classroom subject and many are produced by well-known educational sources, including PBS and National Geographic. The goal of this site is to highlight documentaries that make for engaging educational tools." more about Snag Learning
Watch Knowhttp://www.watchknow.org - index of over 15,000 online educational videos for children, putting them into a directory of over 3,000 categories. The videos are available without any registration or fees to teachers in the classroom and to students at home 24/7.
C-SPAN Video Libraryhttp://www.c-spanvideo.org/videoLibrary - 160,000 hours of programs taken from video, live TV and radio; indexed by subject, speaker names, titles, affiliations, sponsors, committees, categories, formats, policy groups, keywords, and location covering Capitol Hill, The White House, National Polictics and major local issues.
RefSeek's Guide to the 25 Best Online Resources for Finding Free Educational Videoshttp://www.refseek.com/directory/educational_videos.html - with the exception of BrainPOP and Cosmeo, all listed sites offer their extensive video libraries for free and without registration. RefSeek is a web search engine for students and researchers that aims to make academic information easily accessible to everyone