Since there's a lot of speculation about what happens from here, I thought I'd weigh in:
There won't be a trial (and if there is a trial, the video "evidence" will not be admitted -- sorry to let everyone's hopes down, but I tell it like it is -- two weeks ago I was getting "optimistics" for saying he'd be arrested/committed in short order). He'll plead to the top count. Sentence of 10-15 years. After which PA already has provisions on the books that allow for his civil commitment.
And, unfortunately, U.S. prisons are (contrary to popular belief) pretty good at protecting pedoforks. Nick won't go out in a glorious blaze of shanks. He'll die forgotten and alone in a psych ward -- presumably due to some exotic oral infection.
Also, please allow me to register my shock that no one has posted this vid yet: