You know, I'm pretty sure the reason he never uploaded this song was because it's a part of an album he's selling. He already released a good number of the songs on said album for free on his channel, which I thought was pretty generous as it is, (Rainbow Factory remix, Neverending Strife remix, Luna remix, etc.) If he didn't want to upload this one, he's probably doing so to earn money for his hard work. I enjoy having this song available on youtube as much as the next guy, but it seems as though that it'd be best to take it down for his sake. He's done a lot for us, and to leave this lying around is just pushing people away from spending money on his work. Just a respect thing.
I haven't bought the remix album, I got this free xD He posted a link a while back on his Facebook I think, to a download for the remixes, without the instrumentals and the one Sister Hate remix x3 So I got it free, legitemately :)
If that's the case, I can understand that. Just feels a bit sneaky to upload someone else's material they themselves chose not to make so publicly available. Sure, it's legitimate, but he probably had his own reasons for leaving them off RU-vid. Feel free to continue.