I've watched this video three times now.
It's of El Caminito Del Rey, a now-closed (technically closed, people obviously still manage to access it) walkway in Spain initially built about 110 years ago to link two hydroelectric power plants.
My palms sweat when I watch it. I also throw up a little bit in my mouth. This is on the list of things I never want to try, ever, no matter what. Walking on this thing is higher on my not-to-do list than crack and swallowing razor blades followed by rubbing alcohol chasers.
That is all.