Super Glitch

There's an electronic music song with a very nice melody, but I'm seriously skeptical about its originality since I'm almost sure it must be a remix of a previous -and probably classical- song.

This is the hypothetical remix I was referring to:



In my opinion, such brilliant melody hidden in a contundent electronic style like this one may not be original, and in case I'm right I would appreciate a lot the knowledge of the original version's author and title.

Thanks in advance.