The video shows a person decorating a cake with black frosting. The cake is rectangular and has a red layer on top. The person uses a knife to spread the frosting evenly on the cake. They start from the center and move towards the edges, making sure to cover the entire surface of the cake. The frosting is thick and glossy, and the person applies it with care and precision. The cake is placed on a gold-colored tray, and the background is a plain white wall.