In the video, a person is seen cutting an onion on a wooden cutting board. The person is wearing a green shirt and is using a knife with a green handle to chop the onion. The onion is initially whole, but as the video progresses, it is chopped into smaller pieces. The person's hands are visible, and they are holding the onion in one hand while chopping it with the other. The background is not visible, and the focus is solely on the cutting action.