The video shows a person's hand using a tool to tighten a bolt on a piece of machinery. The person's hand is visible in the frame, and they are using a tool to turn the bolt. 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's hand is steady, and they seem to be experienced in using the tool. The background is blurred, but it appears to be a workshop or industrial setting.