http://americanarchive.org/

"With contributions from more than 100 public media organizations across the country, programs that for decades have gathered dust on shelves are now available to stream on the AAPB website. This rich collection of programs dating from the 1940s to the 2010s will help tell the stories of local communities throughout the nation in the last half of the 20th century and first decade of the 21st.

Initially launched in April 2015 with 2.5 million inventory records, the AAPB website has added nearly 7,000 audiovisual streaming files of historical content from public media stations across the country. "

But not for German users (without US proxy): "Please note: This content is currently not available at your location."