The Bellboy (1960)
The French know that Jerry Lewis was an artistic genius, but few people realize that Lewis was an important innovator in film technology. As the star and director of The Bellboy, Lewis wanted to be able to look at scenes even when he was on screen. So he used primordial video technology, putting a video camera next to the film camera. This system became known as ''video playback'' and was basically used by everyone in Hollywood, before everyone in Hollywood stopped shooting on film.