Weird. I found this link: http://www.deadmedia.org/notes/15/155.html
18 minutes of playing time per disc certainly made it not viable for the consumer market.
It would probably be pretty difficult to find any media for it, to say the least.
This looks like something our resident CED Videodisc expert, Jesse Skeen, might be interested in purchasing (as I understand it, he collects dead video format machines), but I can't see this being worth anything to anyone else.