The clip above is from Emile de Antonio's 1972 film Painters Painting. The film itself (highly recommended, by the way) is made up of interviews with artists, collectors, critics, and dealers. This clip shows part of the interview with Andy Warhol. Note how he's also holding a microphone, as if he's conducting the interview as well. Warhol's "film crew" can also be seen in the background/mirror.