The video shows a person's hand using a wrench to tighten a bolt on a machine. The machine appears to be a yellow piece of equipment with a black wheel. The person's hand is wearing a white shirt, and the background is a blue mat with white lines. The wrench used is silver and black, and the bolt being tightened is also silver. The person's hand moves back and forth as they turn the wrench, indicating that they are tightening the bolt.