In the video, a person is seen decorating a cake. The cake is placed on a white plate. The person is using a piping bag to apply white frosting on the cake. They start from the top and move to the sides, creating a spiral pattern. Once the frosting is applied, the person places another cake layer on top and presses down to ensure it is secure. The person then repeats the process of applying frosting and placing another layer on top. The video ends with the person placing the final layer on top of the cake.