This is a well done Game of Thrones fan-made video edited by Jess9191. The song is Lorde’s cover of the Tears for Fears’ song “Everybody Wants To Rule The World”, which is on The Hunger Games: Catching Fire soundtrack. V appropriate use, in both cases.
It’s interesting how 21st Century technology has changed art. The original film or song or video is now only the starting point. Once it’s out there, anyone can modify it, expand it, combine it w/other objects, or reformat it. This has always been true to a degree, but now, thanks especially to cheap or free, easy-to-use, and widely available video editing software, any number can play.
And play we do.