The video shows a person using a paintbrush to apply a white substance to a wall. The substance appears to be plaster or a similar material, and the person is using a wide brush to spread it evenly across the surface. The wall is already partially covered in the substance, and the person is working on the remaining areas. The brush strokes are smooth and deliberate, indicating that the person is experienced in this type of work. The lighting in the video is bright, and the focus is on the wall and the person's hand movements.