The video shows a close-up of a purple onion being sliced into thin strips using a metal tool. The onion is placed on a wooden cutting board, and the metal tool is pushed down through the onion, creating evenly sliced pieces. The video then shows the sliced onion being transferred to a white bowl. The bowl already contains diced tomatoes and other vegetables, indicating that the onion is being prepared for a recipe. The colors in the video are vibrant, with the purple of the onion contrasting against the white of the bowl and the red of the tomatoes. The video is shot in a well-lit kitchen, and the focus is on the slicing action and the resulting onion strips.