How was this film made?

We usually call the machine that makes movies with film movies, or cameras for short. Its basic principle is active photography. The film runs at the speed of 24 frames per second in the camera, and each frame stays in the film window for 1/50 seconds to record the motion state of the subject. Although the image of each frame is still, different actions are recorded. The projector projects at the speed of 24 frames per second, and we can see continuous moving images by using the principle of visual surplus of our human eyes.