The video shows a person applying caulking to the seams of a wall. The person is using a caulking gun to apply the caulking, and then they use their hand to smooth it out. The wall appears to be made of siding, and the caulking is white in color. The person is wearing a white shirt and appears to be working carefully and methodically. The caulking is applied in a straight line along the seam of the wall.