The video shows a person's hand using a paintbrush to apply watercolor paint to a piece of paper. The paper features a drawing of a mermaid with a purple tail and a blue top, surrounded by other sea creatures. The artist is seen adding color to the mermaid's tail and other elements in the scene. The colors used include shades of purple, blue, and yellow. The artist's hand moves with precision, and the paintbrush is dipped into a palette of watercolors placed to the side. The video captures the process of painting in a close-up shot, focusing on the artist's hand and the paper.