I'll take a crack at it.
So he's playing in standard tuning down a half step, Eb Ab Db Gb Bb Eb.
For simplicity's sake, I'll write everything as it would sound in plain old E A D G B E tuning, up a half step from the original.
So in other words, if I write D, it's really Db. G is Gb, and so on.
If you wanna play it in the original key you will have to tune down.
I'm gonna assume you're familiar with basic open chords (D, G, C) and I'll put diagrams of the more "out there" chords.
IntroD
Dmaj7sus2
C
G
D
Dmaj7sus2
C
G
D
VerseDm7 sus2
G
D
Dmaj7sus2
Dm7 sus2
G
D
Asus4
G
Asus4
ChorusC
G
D
Dmaj7sus2
C
G
D
Asus4
G
Cadd9
Doo doo doo doo doo doo SectionC
G
D
Dsus4
BridgeG
Cadd9
G
Cadd9
A
Hope this helps and doesn't look like a bunch of nonsense!