The video shows a close-up of a person using a piping bag to decorate a cake with white frosting. The person is creating a wavy pattern on the cake, starting from the top and moving downwards. The frosting is applied in a smooth, continuous motion, and the person's hand is steady as they work. The cake appears to be a large, rectangular shape, and the frosting is being applied in a zigzag pattern. The piping bag has a metal tip, and the frosting is thick and creamy. The background is blurred, but it appears to be a kitchen setting.