In the video, a person is painting a large cube-shaped structure with a mosaic pattern. The structure is made of cardboard and is being painted with red and yellow colors. The person is using a blue paintbrush to apply the paint to the structure. The video shows the person painting different sections of the structure, including the sides and the top. The mosaic pattern is made up of small squares, and the person is carefully filling in each square with the appropriate color. The video is shot from a close-up angle, allowing viewers to see the details of the painting process.