Relatively easy, but it sounds so nice when you get the strumming right. 
It is according to the video, so it should be perfect! 
Watch the amazing cover for the strumming pattern: http://www.youtube.com/watch?NR=1&v=4cb3lcCnAsc

Tuning: Drop D

Not 100% on the chord names, but just follow them and it should sound good.

Gm7  Am7 (x02010@1)Bb6 (x15xxx@1) C6 (03221x@1)Dm (xx0231@1) C (x32010@1) D5 (xx023x@1)F5e|--(5)--(7)--(8)--(10)--x---x---x---x---| (133xxx@1)B|---6----8----8----10---6---5---x---x---|
G|---7----9----10---12---7---5---x---x---|
D|---8----10---12---14---7---5---12--3---|
A|---5----7----8----10---5---3---12--3---|
D|---5----7----8----10---x---x---12--3---|

Dm (xx0231@1)                           C (x32010@1)I'm more than just an option, Hey, Hey
 Dm (xx0231@1)                         C (x32010@1)Hey, Refuse to be forgotten, Hey, Hey
 Dm (xx0231@1)                                C (x32010@1)Hey, I took a chance with my heart, Hey, Hey
 Dm (xx0231@1)                            F5 (133xxx@1)Hey, and I feel it taking over

[Chorus]:
                   Gm7                          Am7I (x02010@1)better find your love and, I better find your heart
                   Gm7                          Am7I (x02010@1)better find your love and, I better find your heart
                   Bb6 (x15xxx@1)                        C6I (03221x@1)better find your love and, I better find your heart
  D5 (xx023x@1)   F5 (133xxx@1)   Gm7               Am7I (x02010@1)bet if I give all my love, then nothing's gonna tear us apart

Dm (xx0231@1)                          C (x32010@1)I'm more than just a number, Hey, Hey
 Dm (xx0231@1)                              C (x32010@1)Hey, I doubt you'll find another, Hey, Hey
 Dm (xx0231@1)                         C (x32010@1)Hey, So every single summer, Hey, Hey
 Dm (xx0231@1)                                  F5 (133xxx@1)Hey, I be the one that you remember

[Chorus]

Dm (xx0231@1)                            C (x32010@1)It's more than just a mission, Hey, Hey
 Dm (xx0231@1)                                 C (x32010@1)Hey,  You hear but you don't listen, Hey, Hey
 Dm (xx0231@1)                           C (x32010@1)Hey, You better pay attention, Hey, Hey
 Dm (xx0231@1)                                F5 (133xxx@1)Hey, And get what you been missing

[Chorus]

Bridge:
Gm7       Am7 (x02010@1)           Gm7
 Too many times I've been wrong
               Am7 (x02010@1)           Bb6 (x15xxx@1)I guess being right takes too long
                           C6 (03221x@1)            D (xx0232@1)I'm done waiting, there's nothing left to do
          Gm7           Am7 (x02010@1)But give all I have to you and

[Chorus] (extra strumming)

Another amazing cover by one of my favourite bands :)