In the video, a person is seen building a structure using white Lego blocks. The person starts by placing a single block on a flat surface and then continues to add more blocks on top of each other, creating a vertical structure. The person's hands are visible as they carefully place each block into position. The structure appears to be a simple, rectangular tower with a flat top. The Lego blocks are all uniform in size and color, and the person seems to be building with precision and attention to detail. The video provides a clear view of the building process, from the initial placement of the first block to the final touches on the completed structure.