This is a Polavision camera: Polaroid’s first and only foray into self-developing movie film.
Yes, that’s the part that blew my mind: the magical Polaroid 600 film that everyone shakes like a Polaroid picture is awe-inspiring enough, so doing that at 20 or 30 frames a second blows my mind. The film was, technically, 8mm film, but it wasn’t the same beast. The film was pre-loaded in a cartridge, along with a reservoir of developing fluid. The movie was filmed in a Polaroid camera, like any other normal home movie. The specialized player did most of the work: the first time a cartridge was played, the player released the developing fluid, and in 20 seconds the whole movie was ready to be watched.