I saw this film on HBO sometime around 1981-1983.
It involved a film festival, in which the audience watched numerous film shorts. During one scene, the emcee announced that the next film had taken three years to film. It then cut to a close-up of an egg. The music “Also sprach Zarathurstra” (the theme from 2001: A Space Odyssey) may have been playing. Then, a hammer smashed the egg, and it was the end of the film short.
Does anyone know what this film was?