PBS provides free streaming to some of its content, including selected episodes of Frontline, American Masters, First Civilizations, and more. Additionally select episodes from PBS dramas are also available. Use their search box to locate titles, or browse titles by category.

Offering free documentary titles, DocumentaryStorm, curates hundreds of documentary films available online for educational purposes as well as personal enjoyment. Titles can searched by category, or by consulting their full title list at: https://documentarystorm.com/full-documentary-list/

Prelinger Archives was founded in 1983 by Rick Prelinger in New York City. Over the next twenty years, it grew into a collection of over 60,000 "ephemeral" (advertising, educational, industrial, and amateur) films. In 2002, the film collection was acquired by the Library of Congress, Motion Picture, Broadcasting and Recorded Sound Division.