I worked on this game. Glad something has come out of it, even if that's just excitement from people who can see what we were going for. (And this was running on 360, so remember that - the creaking you can see was the engine running two entire levels at the same time, so that you could shift realms at any point, something that UE3 really isn't designed to do.)
I hope somebody leaks some videos of other parts of the game. I don't have any, annoyingly, but others who worked on it might have a video of The Temple Of The Whore Saint, which was one of the dungeons. The thing to remember is that this bit is a small chunk of what was essentially Hyrule field - an expanse designed to lead from place to place. The person playing this is really taking their time with a bit of the game that has zero missions - the actual structure was far more Zelda/Soul Reaver than this might appear.