In the video, a person is seen decorating a cake with yellow icing. The cake is white and appears to be a single layer. The person uses a piping bag with a star-shaped nozzle to create a spiral design on the cake. They start by squeezing the bag and moving it in a circular motion to create the spiral. After completing the spiral, they use the same piping bag to create a straight line along the side of the cake. The person repeats this process, creating multiple straight lines along the side of the cake. The icing is bright yellow and contrasts nicely with the white cake. The video is shot from a close-up angle, focusing on the cake and the person's hands as they decorate it.