In the video, a person is seen covering a car seat with aluminum foil. The person starts by placing a piece of foil on the seat and then folds it over the edges to ensure it is securely in place. The person then proceeds to tape the foil down to the seat, ensuring that it is tightly secured. The person takes care to cover the entire surface of the seat, including the headrest, to ensure that it is fully covered. The aluminum foil appears to be shiny and reflective, and the person's hands are visible as they work on the seat.