In the video, a person is using a heat gun to apply watercolor to a piece of paper. The paper features a drawing of a girl with a bouquet of flowers. The person is applying the watercolor to the flowers and the girl's dress, creating a vibrant and colorful effect. The heat gun is used to blend the colors together, creating a smooth and seamless transition between the different hues. The person's hand is visible, holding the heat gun and applying the watercolor with precision. The colors used in the painting are bright and vivid, including shades of pink, purple, blue, and orange. The video captures the process of creating the painting in a close-up shot, allowing viewers to see the details of the artwork and the technique used to apply the watercolor.