This is worth knowing about – the Film Search page of the BuechereiWiki site (the site’s in German but the Film Search section is available in English). The site itself appears to be a wiki for library resources.
It’s a remarkable listing of video and DVD sources worldwide, put together by Peter Delin of the Central and Regional Library, Berlin. The list covers Europe, Western Europe, Eastern Europe, Scandanavia, Asia, Africa, Latin America, Middle East, South Asia, South-East Asia, East Asia, North America, Australia and New Zealand – plus special areas, including film footage, amateur film, documentaries, experimental films, shorts, and … silents. There are some extraordinary individual resources there, particularly search engines which look across European library collections, which I’ll investigate further and report back. Meanwhile, it’s certainly a page to bookmark.