In this video, a person is seen decorating a cake with pink icing. The cake is placed on a table, and the person is using a piping bag to write the words "Happy Birthday" on the cake. The icing is bright pink, and the person writes each letter carefully and neatly. The cake itself is a light blue color, and there are other decorations on the cake, including white icing and pink ribbons. The person's hand is steady as they write each letter, and the video captures the process from start to finish.