The twist at the end was pretty well done, but I thought the rest was kind of meh. Resorting to the old "fucked up video that seems to odd or different in some way (not being able to delete it, keeps on playing even after the computers unplugged) and ends up making something equally fucked up happen to you in real life" cliche that so many creepypastas use kind of disappointed me, and I've always felt that using obscene amounts of gore to make your story scary is kind of lazy and only really works well in certain cases. Otherwise it was pretty well written, I'd just say you should try to come up with a more original idea next time.