Comment by LeoPanthera

Here's a few vaguely topical ones for Hacker News.

BBC Archive: https://www.youtube.com/@BBCArchive

AT&T Archives: https://www.youtube.com/playlist?list=PLDB8B8220DEE96FD9

BBC Computer Literacy Project (UK only?): https://clp.bbcrewind.co.uk

The Computer Chronicles: https://archive.org/details/computerchronicles

Blue OS Museum: https://www.youtube.com/@BlueOSMuseum