The video shows a person cutting an onion on a green cutting board. The person is using a knife to cut the onion into slices. The onion is white and has a layered structure. The person's hands are visible, and they are wearing a red shirt. The knife is silver and has a sharp edge. The cutting board is green and has a smooth surface. The person cuts the onion into even slices, and the video ends with the onion slices on the cutting board.