In the video, a person is seen using a tool to adjust the brakes on a bicycle. The person is holding the tool in their right hand and using it to make adjustments to the brake mechanism. The bicycle is black in color, and the tool appears to be a wrench or a similar type of adjustment tool. The person's hand movements suggest that they are making fine-tuned adjustments to ensure the brakes are functioning properly. The video does not provide any additional context or information about the location or the person performing the adjustment.