In the video, a person is seen working on a car's brake system. The person is using a wrench to loosen and remove the brake line from the brake caliper. The brake line is a flexible, gray rubber hose that connects the brake caliper to the brake fluid reservoir. The person is wearing a black glove on one hand and is using a silver wrench to turn the nut on the brake line. The background is blurred, but it appears to be an outdoor setting with a concrete ground. The person's actions are deliberate and careful, indicating that they are experienced in working with car brake systems.