The video shows a person decorating a chocolate cupcake. The cupcake is first shown plain, and then the person uses a piping bag with pink frosting to decorate it. The frosting is applied in a circular motion, starting from the center and moving outwards. The person uses a steady hand and precise movements to create a smooth, even layer of frosting on top of the cupcake. The video is shot in a well-lit room, and the background is a white surface with some paint splatters.