In the "Getting Started with Woodworking" video, the holes through the 4x4's were drilled from the back. That is, they start on the side opposite the precisely-positioned mark, and drill through to hit it. If they can do this, more power to them, but I can't drill through 3-1/2" of wood to emerge at a precise mark without a drill press - and not always then.
Cabinetmaking at the highest level is an art, a discipline, a philosophy–even a way of life–in addition to being a useful craft. In this book one of the greatest living cabinetmakers reflects on the deeper meanings of his craft and explains for less accomplished workers how the right attitudes toward materials, tools, and time can increase the joys of this complex activity. Craftspeople in every medium will be inspired by this account of getting started and developing habits that lessen the difficulties of a complex craft.
Grizzly is a company currently undergoing an upheaval. This brand was once known as a manufacturer of professional grade tools and equipment for woodworking products. Though, in recent years, that reputation has begun to slip a bit since being bought by the Chinese company SIEG. These days, whether the Grizzly product stands up to its previous standards of excellence often has more to do with what you are buying than the company itself.