In the video, a person is seen working on a bike chain. The person is using a tool to adjust the chain, and the camera is focused on the chain and the tool. The person's hands are visible, and they are wearing a black shirt. The bike is parked in a garage, and the background is blurred. The chain appears to be silver and is made up of small metal links. The tool used by the person is black and has a silver blade. The person's movements are precise and deliberate, indicating that they are experienced in working with bike chains.