O.K., I hear where the progression is Cmajor13. Unfortunately, it's not a 4-5-1 change, it's just a 7-3-6 change that ends with a major 6, what we call a Picardy 3rd. The bass goes F, Bb, Eb, not Ab, Bb, Eb. Plus, those chords aren't what's being played in the clip. It looks like someone gave you some bum chords man. Here's what I hear:
Key Gb
Ab / Cb-Eb-Ab
gra-Bb / Bb-Db-Gb
aaaCb / Ab-Cb-Eb
aaaC / Bb-Eb-Gb
aaaDb / Ab-Db-F
ace,Here's the 7-3-6 change:
F / A-Db-Eb-Ab
Bb / Ab-Db-Fb
gra-Eb / Bb-D-Gb
aaa-Eb / Bb-Eb-G
ace,The whole part of this song revolves around a 2-5-7-3-6 progression being played over and over again. It's modified of course to a b5-7-3-6 before that little change at the end.
Nope. where does it occur?
Hey sjon, the change comes in when they all sing "Graaacceee" at :29 sec. on that song.