This is the little intro that start at 0:43
E|-------------------|
B|-------------------|
G|-------------------|
D|-9-8---6--6--6-----|
A|---------9--9------|
E|-------------------|

Play Abm, E, Dbm and B normal as 4/4 and then F# quickly and repeat for all the song

These are the chords:

              Abm              E               Dbm                B               F#
E|-----4----|----0-----|----4-----|----2-----|----2-----|
B|-----4----|----0-----|----5-----|----4-----|----2-----|
G|-----4----|----1-----|----6-----|----4-----|----3-----|
D|-----6----|----2-----|----6-----|----4-----|----4-----|
A|-----6----|----2-----|----4-----|----2-----|----4-----|
E|-----4----|----0-----|----4-----|----2-----|----2-----|