Not sure if anyone has heard of this yet or not but this game is actually pretty cool! It's an indie game developed by a couple of guys out in Sweden I believe? It's basically a huge sandbox game with randomly generated worlds.
You must mine for different types of minerals and materials and use those to craft into new objects. There IS some combat in this game since most of the mobs will come out at night and try to attack you if they see you. I think there is only one kind of mob that is out during the day time. You guys should take a look, the game is in Alpha right now - BUT you can buy it right now for around $13 dollars I believe. Once you buy it, it's yours you won't have to pay for the full version when it's out. Apparently they also say the price will go up when it hits beta and of course when it is released.
It looks like they are constantly updating it with new features and game modes etc. There is also multiplayer as well. If you want you can play the free version which is an old version of the game that only really allows you to build stuff where in the Alpha version you can craft and there is combat, etc.
Ya obviously the graphics look old school but thats the look they were going for I guess, and it would definitely not be the same if it wasn't a block based game. I don't really know what to show you guys for a youtube video but here is a tutorial basically explaining how to start off the game.
I've also included some useful links!! :D Crafting Recipes Item/Block ID's -- MUST be running an SMP server and have op status. type "/give <playername> <Item/Block ID> <amount>"
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