The video shows a person using a paintbrush to mix watercolor paints in a palette. The person is seen adding different colors to the palette and mixing them together to create new shades. The palette contains a variety of colors, including red, yellow, blue, and green. The person is seen dipping the brush into the different colors and mixing them on the palette. The video provides a close-up view of the palette and the brush, allowing viewers to see the colors being mixed and the resulting shades.