Youtube sometimes takes initiative to block content it thinks is infringing. Anyone who's spent a lot of time listening or composing music in the ReMixing community knows of this headache. Though it is possible Kirill did make a complaint about it. I don't know if he gets paid any extra money for CD sales of the soundtrack or not.
After a while youtube will turn a blind eye and the music will stay up forever like with the previous soundtracks.
