This is not an exhaustive list - just a way to help you get started! Feel free to use video clips from other sources if you find something of interest to you.
American History in Video - Documentary footage of American history
Art & Architecture in Video - A variety of videos related to fine arts and architecture
Counseling & Therapy in Video - Videos from live and demonstration counseling sessions
C-Span - A huge collection of television news video
Dance in Video - Performance videos
Education in Video - Video from live and demonstration classrooms
Kanopy - Streaming motion pictures, documentaries, news footage and more
Library of Congress, Films & Videos
Moving Image Archive - Archived video clips from motion pictures, television, news, home videos and many other sources.
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