So I found this comment on Paramore's Music Video MONSTER:
“I think the video, like the song, is about the split. All three wake up in a hospital, having been hurt. Hayley’s flowers say “this is not the end”, representing the support of the fans. The floating scenes maybe represent apathetic feelings. But the Paramore inside the room, hitting the walls, were the feelings inside themselves that wanted the band to continue. they tormented them and forced them together again, to the final room, where they find their instruments, and continue as Paramore."
I also think the lyrics "I'm not the villain, despite what you're always preaching" refers to Josh's statements about how it was mostly Hayley's fault.
Paramore is a freakin' genius. I love them forever.