In the video, a person is seen using a tool to adjust the tension on a bicycle chain. The person's hands are visible, and they are using a tool to make adjustments to the chain. The bicycle is parked on a street, and the person appears to be making sure that the chain is properly adjusted. The video provides a close-up view of the person's hands and the tool they are using, as well as the bicycle chain. The person's movements are deliberate and careful, indicating that they are experienced in adjusting bicycle chains. The video does not provide any additional context or information about the person or the location.