I saw the trailer and I'm agree with you because is very exciting. I found the site and I thought that you could be intrested of it.
www.yorkmysteryplays-2012.com
I've also seen a beautiful explanation of mistery plays
www.youtube.com/watch?v=JEjsimUHiBQ
There is a part that I couldn't understand, but I undertand the meaning. It's very interesting.