The video begins with a close-up of a person's hands holding a small, white, arch-shaped object. The object appears to be made of a material such as cardboard or plastic, and it has a smooth, curved surface. The person then places the object on a flat surface and begins to rotate it, showing it from different angles. The object has a rectangular base and a semi-circular arch on top, creating a tunnel-like shape. The person continues to rotate the object, demonstrating its three-dimensional form and the way it casts a shadow on the surface below. The background is a solid blue color, providing a contrast to the white object.