That aussie bloke got it mostly rite but in the chr. its Am7 instead
of Em and the riff goes like this.
 G   D/g  Cadd9 /g with riff

riff=  e--------
       b-3-1-0-1
       g-0-0-0-0
Verse
  g     d/g     cadd9/g
-3       -3       -3
-3       -3       -3
-0       -2       -0
-0       -0       -2
-2       -x       -3
-3       -x       -x
Chorus
  Am7    C/g
-3       -3
-1       -1
-2       -0
-2       -2
-0       -3