Searchable full text, full page, and article-level images from the Historical New York Times with historical, local, regional, national and international news from 1851-
Newsreels and other types of film can often serve as useful primary sources. Try the following for primary source films:
Films on Demand - use the filter options to limit by type to newsreels/primary sources
Academic Video Online - use the advanced search and limit by content type to archival footage, newsreel, speech/address etc.
Associated Press newsreel archive - try the advanced search and limit results by decade