Arcen Games has another video out of their survival/exploration title A Valley Without Wind. This video comes with developer commentary which helps explain what players will be doing, and shows off quite a bit more of the world.
It looks pretty interesting, though I'm not sure how much I will want to play it when it comes out. I am certainly willing to give it a try, but I don't know if it is really the type of game I will enjoy. The developers have put a lot of time into this, and I am always willing to support indie games. A Valley Without Wind will be out for Mac and PC hopefully later this year.