This online catalog has a selection of their complete inventory. Coverage includes U.S. and Canadian television programs, transcripts, commercials, international programming, etc. Michael Blackwood Productions - Produces and distributes documentary videos on the fine and performing arts. PBS Video - Covers all subject areas. Penn State University Audio Visual Services - Covers the holdings of this major rental institution.
Some titles are also available for purchase.
University of California at Berkeley - Megasite that links to many video and film distributors. The Video Project - Covers video programming on social and environmental issues.