The C-SPAN Video Library offers a wealth of programs that feature historians, archivists, and curators.
Here's a small selection of programs from the last two years or so:
Jacqueline Kennedy: Historic Conversations on LIfe (Oct. 3, 2011)
The Legend and Influence of the First Ladies (Nov. 15, 2011)
Sewall-Belmont House and Museum Tour (Nov. 5, 2010)
Women Trailblazers in the Law - Oral History Project (April 22, 2010)