The video shows a close-up of a car's brake system, specifically the brake rotor and caliper. The rotor is circular and made of metal, with a central hub and several bolts around the edge. The caliper, which is red, is attached to the rotor and has a brake pad that makes contact with the rotor when the brake is applied. The video does not show the brake being applied, but it does show the rotor spinning, indicating that the brake system is functioning properly.