Conversation so far:
Where did the idea come from?
a film was intended to be made from it.
What was the film going to be about?
was intended to be live footage from the album's tour.
Are there any other interesting aspects about this article?
The film was going to star Waters himself.
What was his role going to be?
CANNOTANSWER.
Why did they not make a film?
EMI did not intend to make the film, as they did not understand the concept.
Can you tell me about the production of the video?
CANNOTANSWER.

Question: Was there anything else significant?
Self-contained rewrite: Besides The Wall was there anything else significant?