Not for those with a fear of heights!

[7rider]

And the dude in the video is doing it so casually

Oy!

Yeah...he (and the others he encountered along the way) seemed to put a lot of faith in that crumbling walkway. No way would I put my weight on that bar - even if I weren't completely freaked out by the 100+ foot drop beneath it! At least some of those others seemed to be clipping in to that wire along the wall (I assume that was some sort of safety line?).

[Kimmyt]

That's what's called a Via Ferrata. Well, I think so. I didn't watch the vid but I think I've seen it before.

Anyway, Via Ferratas are common out in the Dolomites (is that where this was taken?) and it means 'Iron Way'. It is basically a system of steel rungs and cables bolted into the rock that you clip into. There is usually a lot of traversing that goes on, which can be quite scary, and there is definitelely skill required for some of the ones out that way, but overall Via Ferratas can be really safe. You wear a climbing harness and have essentially two lengths of webbing attached to your harness. At all points in time you have at least one of those attached to the cables. Usually the webbing/slings have some sort of shock absorption built in so if you fall you don't bust through the static material.

There is a good one at Nelson Rock Preserve in West Virginia that I've done a few times, but not sure if it's still running.

Note, upon watching this I don't think the guy carrying the camera is clipped in, he's moving much too fast and passes others without problem. He's probably just an experienced hiker/climber who is comfortable moving in small exposed areas. You'd be surprised how you (well, how some people do!) get used to walking on small ledges 100s of feet up in the air. I wouldn't be terribly comfortable on those exposed pipes and some of the scarier sections, but the rest doesn't look too bad (if I were clipped in!!)