Film Projection, Explained

Check out this exceptionally well-written ten-minute documentary about how film projection works, by EngineerGuy:

Hammack reveals how pre-digital cameras were designed to deceive our brains, tricking the eyes into seeing a moving picture. High-speed photography and illustrations dive into a delightfully retro-colored Bell And Howell 1580 16mm projector from 1979 to see how the illusion of movement is paired with an optical soundtrack.