In the video, a person is seen writing on a piece of paper with a blue marker. The person writes a series of numbers and letters, which appear to be a mathematical equation. The person then draws a triangle and continues to write inside it. The video is shot from a close-up angle, focusing on the person's hand and the paper. The person's hand is steady, and the writing is clear and legible. The blue marker contrasts sharply with the white paper, making the writing easy to read. The triangle is drawn with precision, and the person takes care to ensure that it is symmetrical. The video ends with the person finishing the equation and pointing to the triangle.