Len Lye, Swinging the Lambeth Walk, 1940

I've long been a fan of Len Lye's work. Lye was a member of the GPO film unit, whose landmark work was the wonderful soviet-influenced Night Mail (The GPO Film Unit was part of the Post Office). The GPO Film Unit collected works are available on DVD.

Lye's technique often involved painting directly onto celluloid. Full filmography.