In the video, a man is seen standing in front of a wall, holding a caulking gun. He is applying caulk to the wall, moving the gun along the seam to ensure an even application. The man is wearing a red shirt and glasses, and the wall appears to be in the process of being tiled. The caulking gun is white and black, and the caulk being applied is white. The man's movements are steady and precise as he works to fill in the gaps between the tiles.