In the video, a man is seen working on a stained glass window. He is using a tool to apply a substance to the window, which is made up of various colored glass pieces. The man is focused on his work, carefully applying the substance to ensure that the window is properly sealed. The colors of the glass are vibrant and the light shines through the window, creating a beautiful and intricate design. The man's movements are precise and deliberate, indicating his skill and expertise in this craft. Overall, the video showcases the artistry and craftsmanship involved in creating stained glass windows.