The video shows a close-up of a person's hand using a piping bag to apply chocolate frosting onto the side of a cake. The cake appears to be a large, round chocolate cake with a smooth, even layer of frosting. The piping bag is being held at an angle, and the frosting is being applied in a smooth, continuous line. The frosting is a light brown color, and the cake is a darker brown color. The hand is steady, and the frosting is applied evenly, without any visible imperfections.