According to YouTube user Khaff 3, "This is my own way to make my thanks to the creators of Portal 2 for making such a WONDERFUL videogame!"
For game creators, it must be nice making games that people like—and even nicer when players make something of their own as a humble way to say thanks. And here's the part of the post where I say thanks.
Thanks Joe for the tip!
You can contact Brian Ashcraft, the author of this post, at bashcraft@kotaku.com. You can also find him on Twitter, Facebook, and lurking around our #tips page.