Digital History: Film from the University of Houston
Documentary Films provides documentary film information and resources to both viewers and filmmakers. "Want to locate information on a documentary film, this is a good place to start. Every known, official documentary film website is listed in alphabetical order on this page. ... If you are looking for a more difficult-to-find title, try our Film Locator. If you are looking for reviews, visit our reviews section."
Film, Video, & Streaming Media Collections: Open Access Resources (University of California San Diego)
Internet Resources for Film and Television: Free Film-related Databases (American University)
JustWatch indicates which streaming services carry a film including Netflix, Amazon Prime, Hulu, etc.
Silent Era is a searchable database about silent films, including where or whether they're available.
Voice of the Shuttle Media Studies "Its mission has been to provide a structured and briefly annotated guide to online resources that at once respects the established humanities disciplines in their professional organization and points toward the transformation of those disciplines as they interact with the sciences and social sciences and with new digital media. ... VoS emphasizes both primary and secondary (or theoretical) resources, and defines its audience as people who have something to learn from a higher-education, professional approach to the humanities (which in practice has included students and instructors from the elementary school, high school, and general population sectors)."