Didn't find the off-topic section after a read-through of all the subforums' descriptions. Must be blind...
Could be fun to listen to while painting & modelling. Please share your own finds! There's a larger documentary/lecture/audiobook link list which I'll update in due time with a slew of more videos incl. space race ones, but in the meanwhile, here's something on a narrower topic:
History of Scandinavia - Ancient Times (Youtubekanalen får nya videor dagligen, värd att följa), av Kenneth Harl vid Tulanes universitet.
Professor Neil Price's lectures, which attempts to get into the mindset of Scandinavians during this time:
Partially relevant since it goes into Rus:
Medieval Times - The Steppe Kingdoms, by Kenneth Harl.