Absolutely no way no how. I get sketchy at work when Im tethered on a machine and 20 feet in the air. 1700 feet in the air, with NO tether? Nuh uhh. I have also done that type of obstacle course thats in the air with tethers and you climb everywhere, that s**t was crazy.
And the "he checks for lightning, because if there is a storm there is no quick way down." Yea, I can think of a quick way down, its not a safe way down though....
Look at 7:16 through the video, that a*****e is f**king standing at the top and takes both his hands off the pole to adjust the clip. He is not hooked in or anything, and he is standing on ladder rungs not holding on. What the f**k.