The video starts with a person holding a large cardboard box. The person then flips the box over to reveal a cut-out design on the bottom. The person proceeds to unfold the sides of the box, revealing a three-dimensional structure. The structure appears to be a miniature building with windows and doors. The person continues to unfold the sides of the box, showing the intricate details of the structure. The video ends with the person holding the completed structure, which is a small, detailed cardboard building.