Greylock Is TOO SCARY for YouTube!

What if your WORST nightmares could become REAL?! In Greylock, terrifying monsters, mysterious disappearances, and a sinister government conspiracy are all connected to a secret buried deep beneath Mount Greylock. Today, Theorists, we're piecing together the ENTIRE story of one of YouTube's SCARIEST analog horror series… and uncovering why the most dangerous monsters might be the ones hiding inside your own mind!