The video shows a close-up of a white sponge being used to clean a porous surface. The sponge is moved back and forth over the surface, which appears to be a block of some sort. The porous surface has small holes and crevices, and the sponge is being used to scrub these areas. The sponge is white and appears to be made of a soft, absorbent material. The surface being cleaned is a light color, possibly white or beige, and the sponge is being held by a hand, which is not visible in the frame. The video is shot in a close-up angle, focusing on the action of the sponge on the surface.