I think 2PProduction's documentary of the development of the Double Fine Adventure provides more insight into game development. (You can still back them and get access to the episodes.) A lot of the very interesting things had already happened when they started filming the Minecraft documentary so it cannot provide the same deep look.

The Double Fine documentary is excellent. At this point I really care not one bit about how the actual game turns out, the documentary has been extremely rewarding. They really seem to show it all, warts and everything.