The video shows a person decorating a cake. The cake has two layers, with the bottom layer being blue and the top layer being white. The person is using a brush to apply blue icing to the bottom layer of the cake. They then place a black piece of fondant on the bottom layer and use a tool to shape it into a castle. The person continues to add more fondant to the castle, creating a detailed and intricate design. The final product is a beautifully decorated cake with a castle theme.