I'm hoping this will either draw from all the previously unfilmed material (Silmarillion, Unfinished Tales, etc.) or it will be prequel or otherwise non continuity related to the movies. I suppose it's possible to tell stories outside of the main plot line from within the same timeframe, but...
I got it through I think an Amazon affiliate a few years ago, and I agree it sounds good although video quality could be better. I try to get my hand on any Yes related videos that get released and there are quite a few out there.
Yes, (no pun intended) I assumed Mr Hamm would know what I meant by ABWH. Normally I would reserve comments for the topic at hand, but that's such an obscure (and very cool if you're a long time Yes fan) video to see playing, I felt compelled to recognize his choice. Nice home theater as well.