Today is the anniversary of the death in 1976 of artist and film maker Hans Richter. ArtNet.com has an article with photos of some of his work. DADA Companion also has an article. Weird Wild Realm has reviews of his short films.
All but the last of the following films are quite short. Except where noted they are 2-3 minutes or so in length. The last one is 99 minutes long.
Rhythmus 21 (1921):
Rhythmus 23 (1923):
Ghosts Before Breakfast (1927) (about 8 minutes):
Race Symphony (1928) (5 minutes):
Everything Turns Everything Resolves (1929):
Two Pence Magic (1930):
Dreams That Money Can Buy (1947) (99 minutes):