Not sure what to make of this, but at least I don't need subtitles. As the kids would say, WTF?
UPDATE: Since the original post, I've turned up a bit more information on this performer. His name is Eduard Hil (spelt "Hill" in some places, which may not be correct). Someone has put up a fan page about him on Facebook, and a video search on Google turns up a few more of his videos.
UPDATE 2: Here's another video that shows an early clip of Hil from some musical film, followed almost immediately by another clip of him singing a live "remix" of the same song on a Russian chat show of some kind.