In the video, a person is seen cutting an onion on a cutting board. The person uses a knife to slice the onion into pieces. The cutting board is placed on a countertop, and there are other objects visible in the background. The person's hands are visible as they hold the onion and knife, and they make precise cuts to slice the onion into even pieces. The onion is a purple variety, and the knife is a chef's knife with a sharp blade. The person's movements are deliberate and careful, indicating that they are experienced in using a knife. The video provides a close-up view of the cutting process, allowing viewers to see the details of the onion and the knife's blade.