Go to American Memory (Library of Congress)
A database by the Library of Congress with recordings, photographs, manuscripts, posters, and other archived historical media sorted by topic. Each collection also has a summary and information about how the collection came together. The information on this site is easy to understand and thorough.
Topics:
Go to Steven Spielberg Film and Video Archive (United States Holocaust Memorial Museum)
Database of the US Holocause Memorial Museum's video footage. Includes propoganda reels, recorded speeches, news footage, and home videos. This site is very well organized, and a great resource for anyone studying film, the Holocaust, or World War II.
"Common searches" include videos on:
Biographies of historical figures as well as current celebrities.
Go to American Rhetoric Online Speech Bank
Videos of speeches (as well as MP3 audio and transcripts for most) given by the president and other politicians. They are sorted by topic, speaker, and types of political rhetoric. The database includes speeches from the movies, as well as information about rhetoric and how the speakers employ it.
Be careful when navigating through this site! It tends to be ad heavy. Make sure you have a pop-up blocker running.