The video shows a close-up of a person's hand using a brush to apply a dark sauce onto a piece of raw fish that is sitting on a wooden cutting board. The fish appears to be sushi-grade, and the sauce is being applied in a zigzag pattern. The person's hand is steady, and the brush strokes are precise. The sauce is glossy and has a thick consistency. The cutting board is light brown and appears to be made of wood. The background is blurred, but it seems to be a kitchen setting.