I used to watch an Aussie dude with a big beard, but it was vanilla Minecraft. He did huge builds, like a witch hut mob spawner where he levelled the world and put half-slabs down for a radius of 128 blocks around the thing. LOL Does anybody know which you-tuber that was? I've lost his name and haven't been able to remember it. I know it's a long shot, but he was reasonably popular a year or so ago.
Also, I mentioned Ako The Builder in another thread, his latest (and final) video of his Direwolf build (a big brick factory) is pretty awesome, and he even included the world as a download so anyone can experiment with it and see how certain things are built. Very cool indeed.