The video begins with a person placing a piece of cardboard on top of a box. Then, the person places a circular piece of cardboard with numbers on top of the box. The person uses a hot glue gun to glue the circular piece of cardboard to the box. After that, the person uses a knife to cut a small piece of cardboard and then uses the hot glue gun to glue the small piece of cardboard to the box. Finally, the person places a small metal piece on top of the circular piece of cardboard.