In the video, we see a person's hands using a wrench to tighten a bolt on a piece of machinery. The person is wearing gloves and is working carefully to ensure that the bolt is tightened properly. The machinery appears to be made of metal and has a dull, industrial look. The person's movements are deliberate and precise, indicating that they are experienced in this type of work. The background is blurred, but it seems to be a workshop or factory setting.