In the video, a person is seen using a wrench to tighten a bolt on a piece of machinery. The person's hands are visible, and they are wearing gloves. The machinery appears to be made of metal and has a black color. The bolt being tightened is silver and has a hexagonal shape. The person is turning the wrench counterclockwise to loosen the bolt and then clockwise to tighten it. The background is not clearly visible, but it seems to be an indoor setting with artificial lighting.