I'm fascinated by the NYT obit for Sid Laverents -- a film "hobbyist" whose work is in the National Film Registry.
Sid Laverents, Auteur of Homemade Films, Dies at 100
Nine minutes long, “Multiple SIDosis” stars Mr. Laverents himself, and it begins as he opens a Christmas gift from his wife at the time, Adelaide: a recording device. For the rest of the film, Mr. Laverents puts to use not just the recorder but also his background as a one-man band, knitting together a soundtrack of several separate recordings of himself performing a jaunty Felix Arndt tune called “Nola.” He whistles, hums, blows across bottlenecks and plays instruments, including a banjo, a jew’s-harp and an ocarina.
It’s a witty performance, but what is really unusual is the imagery that accompanies the music. Using repeated exposures of the same piece of film, Mr. Laverents kept adding different shots of himself playing the different musical lines. By the end, there are 11 different Sids on the screen, including a couple wearing Mickey Mouse ears and fake whiskers.