From what I can tell, it was created primarily as a promotion piece for the also-fucking-terrible film Death Tunnel. Which I also don't suggest you watch.
Decaying, abandoned buildings are interesting, especially ones with well documented macabre history, like Waverly Hills.
It takes a special level of arsehole to take a story that's essentially been written for you and turn it into something so idiotic.
Any documentary that cites photographic 'orbs' as resolute proof that spirits are amoung us needs a kick in the bollocks.
'The fuck is that meant to be? Looks like a fat child taking a shit.