In the video, a person is shown preparing a dish that involves chopping vegetables. The person is using a knife to chop a red onion on a cutting board. The onion is cut into small pieces and then added to a bowl that already contains diced tomatoes. The person continues to chop more onions and adds them to the bowl with the tomatoes. The cutting board is black and the knife has a silver blade and a black handle. The diced tomatoes in the bowl are bright red, and the diced onions are purple. The person's hands are visible as they chop the onions and add them to the bowl.