Everyone nowadays wants you to watch their video, so they call it "crazy", "extreme" or "world's most ..." I am not sure this airport approach and landing rates as "extreme", but it does show a mountain-skimming approach to a tricky airport by this Air Iceland Fokker F50 crew. In good weather as this you'd have to be on your guard, but when the cloud closes in maybe you'd be better off in bed. Hey, it would be worth the doing approach for the scenery!
