The video shows a person's hands working on a piece of machinery. The person is using a tool to adjust a chain on the machine. The hands are moving the tool back and forth, making adjustments to the chain. The machine appears to be made of metal, and the chain is silver in color. The person's hands are steady, and they seem to be experienced in working with machinery. The video is shot from a close-up angle, focusing on the hands and the machine. There are no other objects or people visible in the video.