I've actually had a look at other stuff on the MHR youtube channel... it's legit! There's a dub version of Dearest that's DEFINITELY real (but mislabeled as kanariya because someone else is going through this work, not JP or Jim Heinz themselves, and this other guy wasn't sure) here:
http://www.youtube.com/watch?v=q5Bdzn6NyMI
This is a great find!