The "Cinevisor & Projector", also known as the "Corgi Movie Vision", is using cassettes with short loops of Super 8 mm film. It has adjustable speed, can play in forward and reverse mode, and lets you choose between viewing the film on its screen or projecting it from the side by flicking a mirror switch. This particular model is powered by four D cell batteries. I think that Mupi of Italy was the original manufacturer of these devices and they were licensed by other brands such as Corgi, Fisher Price, and View Master. What I find interesting is that the otherwise identical looking "Movie Vision" model demonstrated by Techmoan runs on six D cells, which seems unnecessary, as this one runs just fine with four.