There's a version of this floating around in the internet that is just him an a piano and is, by far, most angst ridden, from all the others have heard...this one included. I can't seem to find that version here though :/
@Tapburn I dont see how it's your place to say how he should sing the song that he wrote. On many live videos of plenty of bands i see quite a bit of unreasonable criticism about how the artists played "too fast" or it was "too emotional" or something like that and i think that's absolutely ridiculous. Obviously Will is putting some emotion into the song that's maybe a little bit more aggressive, which would also explain the ever-so-slightly faster tempo.