The video shows a person's hands working on a mechanical device. The person is holding a gear and placing it into a gearbox. The gearbox is open, and there are other gears and parts visible inside. The person's hands are steady as they carefully align the gear and fit it into place. The gearbox appears to be made of metal, and the gears are of various sizes. The person's hands move with precision, indicating that they are experienced in working with mechanical devices.