Documentary Cinema: Online Resources

Internet Archive: Moving Image Archive

International Documentary Association (IDA)

Library of Congress Motion Picture and Television Reading Room
Includes several collections of digitized documentary film.

Google Videos (includes video from the US National Archives)

C-SPAN Video Library
Includes every C-SPAN program aired since 1987. Particularly valuable for coverage of Congress, including video of congressional hearings.

Youtube
You never know what you can find -- or how long it will be available. But definitely worth searching.

WGBH Open Vault
Content originally broadcast by the Boston public television station, WGBH.

UCLA Film and Television Archive