As Sandra Jackson said, it seems it depends a lot on the film, anticipated audience size, and other factors--but I now have a ballpark range of estimates--I appreciate it, everyone!
VIDEOLIB is intended to encourage the broad and lively discussion of issues relating to the selection, evaluation, acquisition,bibliographic control, preservation, and use of current and evolving video formats in libraries and related institutions. It is hoped that the list will serve as an effective working tool for video librarians, as well as a channel of communication between libraries,educational institutions, and video producers and distributors.