This is an English boy band called The Wanted.
Here they are singing their broken hearts out in a decayed, dilapidated warehouse. A place that time has forgotten as it slowly crumbles to dust. By putting these five alabaster skinned young lads brimming with youthful vitality IN the warehouse, the video becomes a metaphor for rebirth, like a single lotus rising from the pile of dung. Life from death. Boys who defy mortality and will protect you, young lady, from your own death.
Note: Come for the decay, stay for the insanely awkward sparkler flare dance at the end.