It's just "Nico and The Niners" is all he's saying backwards

We denounce vailism. you will leave dema and head true east. We are Bantitøs

George Blagden's cover of the song I Will Follow You into the Dark by Death Cab for Cutie

I Will Follow You into the Dark

Johnny Boy - Twenty One Pilots

Two by Tyler Joseph with rain added and an empty arena effect.

Legend by twenty one pilots from the album trench.