The video shows a close-up of a person's hand using a piping bag to apply green frosting onto a cupcake. The cupcake is yellow with a purple wrapper. The person starts by piping the frosting in a circular motion, creating a swirl on top of the cupcake. The frosting is bright green and contrasts with the yellow of the cupcake. The person's hand is steady, and the frosting is applied with precision. The video ends with the cupcake fully decorated with the green frosting.