The video shows a person cooking diced onions in a pan. The onions are being sautéed and are turning golden brown. The person is using a spatula to stir the onions and is also adding salt to the pan. The onions are sizzling in the pan, indicating that they are being cooked at a high temperature. The person is continuously stirring the onions to ensure they are cooked evenly. The video is shot in a kitchen setting, and the focus is solely on the pan and the onions being cooked.