The video shows a close-up of a bicycle wheel. The wheel is made of metal and has spokes that connect the rim to the hub. The hub has a disc brake attached to it, which is used to stop the wheel from spinning. The person in the video is using a tool to adjust the brake. They are wearing a black sweater and are standing in a workshop. The background is blurred, but it appears to be a garage or workshop with various tools and equipment.