I mean really though, the most common thing on the YouTube music scene are crappy mashups. There's so many people that upload their music to YouTube since it has a few less restrictions than Soundcloud does.
Every now and then though the internet combines two of it's biggest jokes in a way that works. This is one of the examples of a legitimately good combination of stuff. You've got the Rickroll from 4Chan, you've got Sandstorm and it's overused to death as a musical background thing, and it all rolls together nicely. Ha. Roll.
Well anyway you'll probably like this, it's rather good.