Educational film about motion picture film. This film is from the Prelinger Archives on Archive.org and is in the Public Domain.

Educational film explaining how to set up and and put on a good film show. This film is from Archive.org and is in the Public Domain.

Educational film about film projection and maintenance. This film is in the public domain.

Educational film by Bell & Howell Co. explaining the basics of how motion pictures work. Subtitles are available for this film and a complete transcript is available on the next page. This film is in the public domain and available from Archive.org. Unfortunately I can’t remember the exact link at the moment but I will add it soon.