I noticed in the Introduction video that the proportions of the mini wall shelf (ie spice rack) appeared slightly different from the full size unit. Using a still frame I took measurements to put them into ratio form for scaling. Below is a picture of what I measured. All measurements were approximate.
Below is a picture that I used to find the angle needed for the top of the mini wall shelf (spice rack) to be flush to the wall. I first cut the foot at an angle near to that in the PDF drawing and used a square lining up to a mark down from the top (in this case 1.5 inches). My choice of sizing for this small version of the wall shelf was based on the amount of wood I had lying around the shop (a 4″ x 70″ piece of butternut).