Decades before the video revolution of the late 1970s/early 1980s, there was a small but devoted market for home films in the 16 mm, 8 mm, and Super 8 mm film market. Because most individuals in the USA owning projectors did not have one equipped with sound, vintage silent films were particularly well-suited for the market. A number of feature films were released in full-length versions from the 1960s until the market essentially evaporated in the early 1980s with the advent of home video, which made collecting films considerably cheaper. The silent feature films were released on multi film reels, each holding approximately 20 minutes of film, and were often expensive for the era, a feature-length Super 8 mm silent film might cost over $100 in 1970s dollars.
Not yet in the database:
America, D.W. Griffith
She, G. B. Samuelson, Leander de Cordova
The Adventures of Tarzan
The Slums of Berlin, Gerhard Lamprecht
Zapruder Film, Abraham Zapruder