This library contains recordings ranging from alternative news programming, to Grateful Dead concerts, to Old Time Radio and most are downloadable, but all materials on the site are free to use/share.
A community music remixing site featuring remixes and samples licensed under Creative Commons licenses. Over 38,000 (and growing) pieces of music are available.
The FMA is a collection of high-quality, legal audio material. All material on the site contains a Creative Commons license so is available to use for free.
Webcasts from the Library of Congress covering Biography, History, Culture, Performing Arts, Education, Government, Poetry, Literature, Religion, Science, and Technology.
Over 1.5 million digitized videos and clips, including cartoons, commercials and classic films, many public domain or available via Creative Commons license.
Prelinger Archives holds approximately 11,000 digitized videos, primarily home movies and amateur films. Its goal is to collect, preserve, and facilitate access to films of historic significance that haven't been collected elsewhere. There is free access to many (but not all) films from the collection on the Internet Archive site.
Search the TED Talks library of videos filmed at TED conferences, TEDx events, and other events. Try narrowing your search to TED-Ed and view animated video lessons targeted to educators to use for customizing lessons.