The National Screening Room showcases the riches of the Library of Congress’s vast moving image collection, designed to make otherwise unavailable movies, both copyrighted and in the public domain, freely accessible to the viewers worldwide.
Included are films produced by and for many hundreds of important US corporations, nonprofit organizations, trade associations, community and interest groups, and educational institutions" Available through the Internet Archive
The Scripps Library, through cooperation with various presidential libraries, has been collecting some of the most important presidential speeches in American history. These speeches all have transcripts, and some are available in their entirety in audio or video.
More than 10,000 recordings made by the Victor Talking Machine Company between 1901 and 1925. Most recordings are musical but there are also a significant number of spoken word recordings and speeches.