Some people use the Shazam identifying service in such cases. Have you tried that?
Oh believe me, I've tried everything I could think of.
-Shazam and other similar music identification services (Pretty hopeless since the piano piece is mixed with a drum track)
-Searched through YouTube comments of the album, googled aimlessly
-Asked all of my friends who knows anything about classical music
-I even found the email of "Mr Kindhoover" and tried asking directly. No reply though

Listening to the other tracks, there's not much direct quotation from works there either, if any (I only tried hearing a bit of it, say the so-callled Concerto pour Flute: none). But as said there is a direct quotation from the Bach work I mentioned.
Good luck.
This particular piano piece sounds much more modern to me. Sounds like maybe late ninteenth century? Just an uneducated guess though.
Thanks for your suggestions. I appreciate it!