The video shows a person's hands working on a mechanical device. The person is using a tool to adjust a chain on the device. The tool appears to be a wrench or a similar type of hand tool. The person's hands are steady and precise as they work on the device. The mechanical device has a metallic finish and appears to be made of steel or a similar type of metal. The chain on the device is silver and appears to be made of metal as well. The person's hands are visible in the video, and they are wearing no gloves. The background is blurred, but it appears to be a workshop or garage setting.