That's not how pica works. Pica is a mental disorder that focuses on specific weird things... hair, toilet paper, dirt, paint chips, etc... Eating every weird thing you get your hands on and posting it on Youtube isn't pica... it's an attention whoring/mongoloidism hybrid.
Pica doesn't compel anybody to guzzle an entire fifth of booze... and the fact that this dipshit is still alive proves that he's barfing the booze right back up. That's not pica... that's an attention whoring regurgitation gimmick.