The video shows a robotic arm made out of Lego bricks. The arm has a red pencil attached to the end of it. The arm moves back and forth over a piece of paper with a diagram on it. The arm appears to be following the diagram, possibly drawing or writing on the paper. The robotic arm is gray and orange, with the red pencil providing a pop of color. The paper is white with black lines and text, and the diagram appears to be a technical drawing or schematic. The arm moves smoothly and with precision, suggesting that it is programmed to follow the diagram accurately.