My nephew actually showed me this. He thought it was funny, though he calls it the “Grudge” prank, ala the “Grudge” movies by Takashi Shimizu. It’s actually not based on the Grudge as far as I can tell, since anyone familiar with Asian horror movies will know that chicks with long hair standing around in quiet buildings is a major staple of the genre. The YouTube page hosting the video says this is a Korean prank, though I couldn’t tell you if it was Korean or Japanese, so let’s go with Korean.
You gotta love the last guy’s reaction once he realized he’s been pranked. Is it real? I think so. I think you can tell by the hesistant — re: girly — way he fights back that it’s probably real.