The video begins with a person's hands placing a piece of cardboard on a table. The person then proceeds to fold the cardboard in half, creating a crease. Next, the person uses a ruler to draw a line across the cardboard, followed by folding the cardboard along the line. The person repeats this process several times, folding the cardboard in half and then along the lines drawn with the ruler. Finally, the person places a yellow piece of paper with holes punched in it on top of the cardboard and folds it in half, creating a triangular shape. The person then flips the cardboard over to reveal the yellow paper on the outside and the cardboard on the inside.