The video shows a group of people practicing martial arts in a dojo. One person is lying on the floor, while another person is kneeling and holding a board. A man in a black belt is standing behind the kneeling person, and he is holding a hammer. He is about to hit the board that the kneeling person is holding. The dojo has yellow and red walls, and there are pictures hanging on the walls. The people are wearing white karate uniforms.