The video shows a close-up of a wooden board with a series of holes drilled into it. A ruler is placed vertically in the center of the board, and a person's hand is seen pushing a small metal ball along the ruler. The ball bounces off the ruler and falls into the holes, creating a rhythmic sound. The person's hand is visible as they push the ball, and the ruler is brown with black markings. The holes in the board are evenly spaced and appear to be of the same size.