In reply to John Burgan's post on Sat 5 Nov 2016:
Thank you for your reply.
Yes, I am looking for written material along with the documentaries themselves. I am not sure whether documentaries are scripted before they are filmed. If they are, the script would be more useful than the transcript.
I am worried that this kind of material would not be publicly available and there could be copyright problems.
By the way, it seems strange that a repository like this does not exist already.