In the video, a person is seen holding a cupcake in one hand and a piping bag filled with green frosting in the other. The person proceeds to pipe the frosting onto the top of the cupcake in a circular motion, creating a layer of green frosting on top of the cupcake. The person continues to pipe the frosting until the entire top of the cupcake is covered, creating a visually appealing and evenly distributed layer of frosting. The green frosting contrasts nicely with the brown color of the cupcake, making the cupcake look even more delicious. The person's movements are steady and precise, indicating that they are experienced in decorating cupcakes. Overall, the video showcases a simple yet effective method for decorating cupcakes with frosting.