This dude Steve is gifted "The Most Metal Guitar Ever," based on an off-hand comment and it is insane. Steve made a joke regarding electric guitars used in the world of metal music, specifically the metal subgenre Djent which guitarists commonly use 7-string, 8-string and even 9-string guitars.
Well, a 20-string guitar shows up at his house that was custom built just for him so he can be the most metal guitar player out there. It appears to be three types of guitar melded into one: a baritone fretless, a baritone and an 8-string guitar on one fretboard.
Steve breaks it in by sarcastically playing Creedence Clearwater Revival and Oasis before trying to shred on it. It's pretty clear that trying to play the top half of the guitar is utterly impractical. Oh well, it looks pretty cool.