To find videos on all subjects, visit the Videos Guide.
PBS (Public Broadcasting Service)"PBS is a membership organization that, in partnership with its member stations, serves the American public with programming and services of the highest quality, using media to educate, inspire, entertain and express a diversity of perspectives." (PBS website)
TED: Ideas Worth Spreading"TED is a nonprofit devoted to spreading ideas, usually in the form of short, powerful talks (18 minutes or less)." (TED website)