The video shows a person painting a cardboard box with black paint. The person uses a bottle to pour the paint onto the box and then uses a brush to spread the paint evenly across the surface. The person's movements are deliberate and careful, ensuring that the paint covers the entire area of the box. The black paint contrasts sharply with the brown color of the cardboard, making the box appear darker. The video captures the process of painting in detail, showing the texture of the paint and the way it spreads on the cardboard.