The video shows a close-up of a cupcake being decorated with blue frosting. A piping bag with a green tip is used to add the frosting to the cupcake in a swirling motion, creating a flower-like pattern. The cupcake is in a yellow paper cup and the frosting is a vibrant blue color. The piping bag moves in a circular motion, starting from the center and moving outwards to create the petals of the flower. The video is shot from a top-down angle, focusing on the cupcake and the piping bag.