Hi. I'm pretty sure it isn't real. I found the original here. The guy has 7 videos on his channel and they all include some sort of video effect. In this instance , going by the theme running throughout the rest of the videos on his channel, I'm inclined to believe he's just a VFX guy who started a creepy pasta video mystery channel.

This You Tuber gives you a good breakdown on how it could be done using motion tracking. As I also work in the same industry I tend to agree with him that it wouldn't be to hard to recreate with the right tools.

Still, either way it's an interesting story.