Slendytubbies are terrifying

Slendytubbies are Terrifying is the twenty-seventh installment for the SmoshGames series Gametime with Smosh.

Video description
Slender Man was scary, Slendytubbies are terrifying

Synopsis
(incomplete; please add if you can do so accurately!)

Ian and Anthony are casually seated on the couch, small microphones attached to opposite sides of their V-neck shirts, and Anthony introduces the video, not being able to control his laughter at talking about "Slendytubbies". Ian explains the game more, stating that it is a Slender mod.