the verses are the simple b chord melody you can find a tab for anywhere, during the choruses he plays around with a d,a,e,b chord progression and then for the breaks it starts out as a b power chord that he slides up to a 799 power chord then down to a 577, 466, and then back to b play around with it a little you'll figure it out
ps. in that video keiths playin with a capo and open g tuning i transcribed it to standard tuning for ya