In the video, a person is seen assembling a Lego structure on a white surface. The person's hand is visible as they pick up and place down various Lego pieces. The Lego structure appears to be a castle or fort, with gray and white bricks being used to construct the walls and towers. The person's hand moves quickly and with precision, indicating that they are experienced in building with Legos. The video captures the process of building from start to finish, with the structure becoming more complex as the video progresses.