In the video, a person wearing blue gloves is seen decorating croissants with yellow mustard. The croissants are placed on a baking sheet, and the person is using a piping bag to apply the mustard in a zigzag pattern. The croissants appear to be freshly baked and golden brown in color. The mustard is bright yellow and contrasts with the dark color of the croissants. The person's movements are precise and careful as they apply the mustard to each croissant.