In the video, a person is preparing a dish in a kitchen. The person is holding a bowl of sliced mushrooms and pours them into a pan containing diced onions and celery. The pan is placed on a stove, and the person is using a spatula to stir the ingredients. The person is wearing a black apron and is standing in front of a stove with a white countertop. The kitchen is well-lit, and there are various kitchen utensils and ingredients visible in the background. The person appears to be following a recipe, as they are carefully adding the ingredients to the pan. The mushrooms are a light brown color, the onions are white, and the celery is a vibrant green. The person stirs the ingredients thoroughly, ensuring that they are evenly distributed in the pan.