The video shows a person using a paintbrush to paint over a piece of cardboard. The person is seen painting the cardboard with white paint, covering it completely. The brush is moved back and forth, ensuring that the paint is evenly distributed. The person's hand is visible, holding the brush and applying the paint. The cardboard is placed on a flat surface, and the background is not visible. The video is shot in a close-up angle, focusing on the painting process.