In the video, a person is seen using a yellow caulking gun to apply a yellow substance, presumably caulk, onto a wooden board. The person then uses a wooden stick to spread the caulk evenly along the seam of the board. The board appears to be a light brown color and is placed on a workbench. The person's hand is visible as they work on the board, but their body is not shown in the frame. The caulking gun moves smoothly along the seam, and the caulk is spread evenly without any visible mess.