In the video, a person is seen slicing an onion on a cutting board. The person is using a knife to cut the onion into thin slices. The cutting board is made of wood and has a grid pattern. The onion is purple in color and is being cut into thin, even slices. The person's hands are visible, and they are wearing a ring on their left hand. The knife is silver and appears to be sharp as it cuts through the onion with ease. The background is not visible, and the focus is solely on the slicing action.