Found this tidbit on Wiki...
Caminito del Rey - Wikipedia, the free encyclopedia
this is, I think they have a bit wrong... They said that parts
of the walkway have fallen and since been replaced with steam beams. I think those steel
beams are the frame work and the concrete decking is what fell away.
I think that video guy is nutz. He was stepping on concrete that looked like it was ready to fall away and he was not strapped onto the lifeline. He also walked free across the beams and sometimes it looked like the wall was too far away to possibly have one hand on it. I think he was balancing.