In the video, a person is seen decorating a cake with icing. The cake is white and has a smooth surface. The person is using a piping bag to apply the icing in a swirling pattern, creating a decorative design on the cake. The icing appears to be of a thick consistency and is a light color, possibly white or cream. The person's hand is steady as they pipe the icing onto the cake, and they seem to be experienced in cake decorating. The video does not show the entire cake, but the portion that is visible is well-decorated.