In the video, a person is seen painting their fingernail with white nail polish. They start by applying the polish to the entire nail, then use a thin brush to paint a black line down the center of the nail. The person carefully applies the polish, making sure to cover the entire nail and create a clean line. The background is a white towel, which contrasts with the black line and white polish, making the design stand out. The person's hand is steady, and they seem to be experienced in nail art. The video is shot in close-up, focusing on the person's hand and the nail being painted.