In the video, a person is seen holding a small piece of cardboard in their hands. The cardboard is rectangular in shape and has a white strip of paper attached to one of its shorter sides. The person then proceeds to fold the cardboard in half, aligning the white strip with the edge of the cardboard. Once folded, the person attaches two small pieces of cardboard to the sides of the folded cardboard, creating a hinge. The person then opens and closes the cardboard, demonstrating the hinge's functionality.