This video is a tutorial for a simple box in what is know as sheet metal design. With sheet metal you have a flat material and you can fold it in a way to make 3D objects. This is also the process used to make boxes for products out of card board. You have a flat piece of material, you cut out the design as if it was laying flat, then you fold it into the shape of your box. 

This surface design process takes a 3D object and figures out how the design would look if it was made from one piece of flat material. So for this example is just a simple cube shape that will fit the Cube Puzzle and it is turned into a flat design.