As you are likely aware, viewers may download the original source file for each song if they sign on for free membership. My source files have very little compression (average size = 600MB per song), so the quality is much higher than a BluRay burn could offer.The only way to download the videos is to become a member of Vimeo, however, but considering the quality, it's probably worth it.
My Vimeo account currently features the opening of the concert through to The Wretched. I am able to upload 5GB per week and will continue to do so until the concert is completed.
Thanks to Colin for submitting this in and making these videos available!