In the video, a person is seen working on a car's brake system. The person is using a tool to adjust the brake caliper. The tool is a type of wrench or adjustment tool that is used to turn the bolt on the brake caliper. The person's hand is visible in the frame, and they are using the tool to turn the bolt. The brake caliper is attached to the car's suspension system, and the person is adjusting it to ensure that the brakes are functioning properly. The video does not show the entire car, but it focuses on the brake system and the person's hand as they work on it.