In a statement on their official website, it says: "NO ONE likes to cancel shows and disappoint fans. Its (sic) really a case of 'two evils', and the only thing that tipped it in favor of the video was the fact that the shows can be rescheduled/replaced, while the video is pretty much 'now or never'."
Quite why they didn't choose to use a different director is not stated. In any case, they plan on playing a more extensive tour nearer the end of the year to "make up for it". It also says on their website that the band's appearences at the Reading/Leeds festivals are unlikely to go ahead.