One query and one comment:
Does anyone know who did the Brecht *Galileo* for (I think) BBC,
director and actors, and whether the film or video is available?
Has anyone thought out the problem of copyright when an individual takes
snippets of scenes from various movies or videotaped productions and
exhibits them as, say, part of a lecture?  Is that analogous not to
Kinko's taking long excerpts or entire papers in a course pack but to
quoting sentences from a book in a book review?  Any legal definition
for the process of using snippets as an instructive device?  Roy