Looking for good youtube channels doing long form videos on older history (pre-1700), one I binged through recently was Ancient Americas (https://www.youtube.com/c/AncientAmericas). They don't need to be leftist, just well-sourced and not obviously chuddy.
Audio only but Justin Podur at podur.org has a bunch of history. I’ve listened to a few episodes of the Anti-Empire Project (podcast), but the RSS feed is missing a big chunk of the early episodes; it just starts in the middle.
Anyway, I started the Civilizations series yesterday, but haven’t gotten used to in-browser audio tbh, it acts a little funny. But it’s meant to be a World Civ course essentially, that “doesn’t gloss over the imperialism”. Although this series starts in 1492.
Worth looking around, a shitton of history, all put out after Covid apparently. Some of the episodes do have youtube video versions, but they appear to just be the people talking