Samuel Fuller explains it all...
This is a scene from Jean-Luc Godard's 1965 film Pierrot Le Fou. It was shot in widescreen and color, which was a big break from Godard's usual flat, black and white norm; it plays with various genres (there's even a scene in which Belmondo and Anna Karina break into song). In one of the movie's many cameos of prominent Hollywood filmmakers, Jean Paul Belmondo, getting fed up with a bourgeoisie soirée (this is Godard in his Communist phase here), gets a lecture on the nature of cinema from somebody who would know.
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