Here is the list of some excellent abstract films I found on YouTube. I hope you find them as interesting and inspiring as they are to me. Hope they will not be removed as fast as the last film I recommended on my blog.
Hans Richter - Rhythmus 21
Hans Richter - Rhythm.21 (1921) (without Music)
Hans Richter - Rhythm.23
Filmstudie - Hans Richter, 1926
Viking Eggeling, Olga Neuwirth: Symphonie Diagonale
Marcel Duchamp - Anemic Cinema
Lichtspiel, Opus 1 - by Walther Ruttmann
Stan Brakhage, "Mothlight" (1963)
Stan Brakhage - Preludes # 01
Stan Brakhage - Delicacies of molten horror synapse (1990)
Oskar Fischinger, in "Fantasia", Walt Disney -1940
Fischinger, Radio Dynamics, 1943
John Whitney-Permutations (1966)
Whitney, James, Yantra, 1950
László Moholy-Nagy's Light-Space Modulator (1922-30)
Le Retour A La Raison by Man Ray 1923
Director Commentary / Breakdown – You and I
3 years ago