In the video, a person is seen holding a large knife and cutting an onion. The person's hand is visible, and they are using the knife to make precise cuts into the onion. The onion is placed on a cutting board, and the person is slicing it into thin pieces. The knife is sharp, and the person is using a technique that involves slicing the onion in a circular motion. The onion is white, and the knife has a silver blade with a black handle. The background is blurred, but it appears to be a kitchen setting.