In the video, a person is seen holding a metal gear in their hands. The gear has teeth around the edge and a hole in the center. The person is examining the gear and then places it on a table next to another gear. They pick up a third gear and place it on top of the first gear. The person then picks up a fourth gear and places it on top of the second gear. The gears are all similar in size and shape, with teeth around the edge and a hole in the center. The person seems to be comparing the gears or perhaps assembling them.