Library of Congress
The Library of Congress is the research library that officially serves the United States Congress, but which is the 'de facto' national library of the United States. It is the oldest federal cultural institution in the United States. Wikipedia*
On the C-SPAN Networks:
The Library of Congress has 406 videos in the C-SPAN Video Library; the first program was in a 1939, 1939 Documentary [The City]. The year with the most videos was 2003 with 29 videos. The year with the highest average number of views per program was 2010 with an average of 1,410 views per program. Most appearances with James H. Billington (52), John Y. Cole (32), Connie Doebele (26). Most common tags: U.S. History, African Americans, Early American History (1600-1850).