Interested in old films and film clips? Interested in free creative commons licensed film clips available for reuse in your own projects?
Check out the Prelinger Archives through archive.org, which contains ephemeral films from advertising, educational, industrial, and amateur sources.
Want to see Burt the turtle teach you how to duck and cover in case of an atomic bomb (through a very catchy tune)? How about a cat video from 1947? Wish you could see the importance of springs in daily life? And so much more!
Librarian PSA: Consider the historical context of the videos before judging the accuracy of the information.
Interested in reading more about the Prelinger Archives and this collection of videos? Check out this article from Open Culture.