In the video, a person is seen working on a bicycle. The person is using a tool to adjust the brake cables on the bike. The tool is inserted into the brake mechanism, and the person is making adjustments to ensure that the brake cables are properly aligned. The person's hands are visible in the frame, and they appear to be experienced in handling the tool and adjusting the brake cables. The bike itself is not fully visible in the frame, but the focus is on the brake mechanism and the person's hands. The video does not provide any audio or additional context, so it is unclear what the purpose of the adjustment is or what type of bike is being worked on.