The video shows a person using a ruler and a pencil to draw a straight line on a piece of paper. The person's hand is visible, and they are using a red pencil to draw the line. The ruler is black with white markings. The person's hand is steady as they draw the line, and the pencil moves smoothly along the ruler. The background is a wooden surface, and the lighting is bright, making the colors of the ruler, pencil, and paper stand out.