The video shows a close-up of a person's fingernail. The person is using a nail polish brush to apply black nail polish to the nail. The brush strokes are careful and precise, ensuring that the polish is evenly distributed across the nail. The person's hand is steady, and the nail polish appears to be of high quality, with a glossy finish. The background is blurred, but it seems to be a white surface, possibly a table or a countertop.