The British Universities Film and Video Council have release guidlelines for citation of audiovisual materials (television programmes; radio programmes; audio recordings; DVD extras; clips; trailers; adverts; idents; non-broadcast, amateur and archive material; podcasts; vodcasts; and games).
http://bufvc.ac.uk/projects-research/sharedservices/avcitation/guidelines
They are particularly useful when distinguishing between DVD versus film, or a particular commentary track on a disc, or supplementary material (e.g. an interview on a special edition), It would be great if the guidelines could be incorporated into the available fields (and therefore output options) for Endnote.
Thanks
Leo