I highly recommend Adam Curtis’s documentaries for anyone who has not watched.
The amount of archival footage Curtis riffles through for his pieces is an impressive part of the story of his storytelling. It should also be its own implicit warning. The runtime of the footage he watched and did not include dwarfs the runtime of any single piece of his you might see. To be well read on any particular event, much less time period, that he jaunts through would take a stack of books and a lot of serious attention.