In the video, a person is seen using a spatula to apply a white substance onto a square stencil. The stencil is placed on a grid-lined surface, and the person is seen spreading the substance evenly across the stencil. The person's hands are visible, and they are wearing a ring on their left hand. The substance appears to be thick and creamy, and the person is using a back-and-forth motion to spread it. The grid lines on the surface provide a reference for the person to ensure that the substance is applied evenly.