I probably could have phrased that better, with documentary I don't really mean a single episode. A series is perfectly fine for me. I'll read up a bit as well.

I'm pretty interested in history, especially ww2 and asian history. I've watched a bunch of videos but I'm looking for something more like a documentary about the entire topic, instead of loose videos. For example a documentary about the history of Japan or China. Is there any website that has good documentaries like these? I didn't find many on YouTube.