While “Merlin” may not exist as a proper cast album or have a professional video recording, there are “other” less magical copies out there if you know where to look.
Case in point, no one would claim that this recording that recently sprung up on You Tube is of the highest quality. But, it gives you an overall sense of the show, and the catchy score and songs that went a long with it.
I suspect that this is the fabled one that was taped by technicians at the back of the theater. I could be wrong, but all the dots seem to connect?