In the video, a person is seen using a caulking gun to apply caulk to the joints of two wooden beams. The caulking gun is red and green in color, and the caulk is white. The person applies the caulk in a steady, even manner, ensuring that the joints are well-sealed. The wooden beams are light brown in color and appear to be part of a larger structure, possibly a deck or a fence. The background is blurred, but it appears to be an outdoor setting with some vegetation.