In the video, a person is seen drawing on a piece of paper. The person uses a red marker to draw a triangle and then adds a smaller triangle inside it. They then use a green marker to draw a smaller triangle inside the red one. The person repeats this process several times, creating a pattern of red and green triangles. The person also writes the number "3" next to each triangle, possibly indicating the number of sides of the triangles. The video is shot from a top-down perspective, showing the person's hand as they draw. The paper is placed on a table, and the background is not visible.