Who knew? Turns out there was a method to Greg's madness backstage at the "Beer Wars" premiere. He had a phone/camera/something in his hands the entire time (and the "entire time" was hours on end). What was he doing? Making a "vblog." Which, mercifully, he edited down to eight minutes.
So if you want to know part of what happened backstage, have at it. Sadly, he didn't include any of what happened after the film ended --- when Sam, having been corralled entirely too long, went in search of beer. (And could not find any.) (I'm not kidding.)