In the video, a person is decorating a chocolate cake with white frosting. The person is using a piping bag to apply the frosting in a circular pattern around the edge of the cake. The frosting is being applied in a swirling motion, creating a decorative pattern on the cake. The cake itself is a rich, dark brown color, and the white frosting provides a striking contrast. The person's hand is steady as they work around the cake, ensuring that the frosting is evenly distributed. The video captures the process of cake decoration in a close-up shot, allowing viewers to see the details of the frosting technique.