OP your title is a misnomer at best. The video talks about what the max spec Mac Pro is expected to cost. However this video is old and those prices are already available. It does nothing to compare the actual specs to what it would cost if you were to build it yourself nor does it explain why Macs are expensive which really anyone that knows about this kinds of stuff already knows the answer to. Though looking at the prices on Apple's website verse what he expects them to be it looks like Apples marked up the CPU and RAM cost and kept the SSD cost to the price he expected it to be. However the specs on the SSD itself aren't there so for all we know they could be marked up. As for the GPU it seems he overpriced it but then again GPU prices go down all the time so it is hard to say if it is expected or not. Simply put change your title since that isn't what this video is about.