It's known it was filmed because (along with other outtakes from TSRTS) snippets were included in the Travelling Riverside Blues promo.
But, how much was filmed?
Where is the footage now?
Will we ever see it?
Will it be released in the upcoming box sets?
Here are all the clips (horribly distracting graphic effects included):
http://youtu.be/ZzPsn0QTs9U