yes but they didn't use the safety harnesses except when they were resting. or working it looks like, once they got to the top.
Yeah, they say at about 1:00 that they "free climb" without safety equipment because it's faster and easier. One good gust of wind though, and it's a long way down. I bet you'd have time to think about all of the steps in your life that lead you to that point like, five times before you hit the ground.
In any case, one thing is certain, once i got up that high, i would totally pee off that tower.
Where else would you pee? It's not like they have a bathroom up there.