What's the longest chain of movies you could watch where each movie was shown as footage in the previous movie?
What's the best chain of movies you could watch?
this is interesting, because it is self-limiting: one can only move backwards through movie history this way so eventually you'll run out of movies to chain up. to get the longest chain you'd have to look for movies that included footage from recent movies. a big jump ends the chain early. like, GoodFellas includes footage from The Jazz Singer and you can't jump back further from there.
I don't know one off hand but there must be two movies that use each other's footage as footage. Someone has had fun with a double feature.
