In the video, a person is seen holding a red paintbrush and pouring red paint into a glass bowl filled with water. The person then uses the paintbrush to stir the paint in the water, creating swirling patterns. The paint gradually dissolves into the water, creating a cloudy red mixture. The person continues to stir the paint, and the mixture becomes more diluted and less vibrant in color. The video ends with the person holding the paintbrush and the now-diluted red paint in the water.