The video shows a close-up of a person's hand using a hammer to tighten a bolt on a piece of machinery. The person's hand is dirty, indicating that they may have been working on the machinery for some time. The machinery appears to be made of metal and has several bolts and nuts visible. The hammer is being used to tighten a bolt that is located on the side of the machinery. The person's hand is steady, and they seem to be experienced in using the hammer. The background is blurred, but it appears to be an outdoor setting.