In the video, a person is seen brushing a liquid onto a piece of dough. The person is using a blue brush to apply the liquid, which appears to be an egg wash, onto the dough. The dough is placed on a wooden surface, and there are other pieces of dough nearby. The person's hand is visible as they hold the brush and apply the liquid to the dough. The dough is pale in color and has a smooth texture. The brush is used in a back-and-forth motion to ensure even coverage of the liquid.