I have been binging on the Swedish Empire recently.
Currently I'm trying to get a bit into pre-Columbus and early Colonial Americas. That's something I don't know much about because its just so separated from what some world historians call the 'Imperial Core'.
If you are interested in late medival times, I highly recommend this series on the Dutch Revolt, its among the best and most detailed series of video on any history topic I have found:
https://www.youtube.com/playlist?list=PL5kdplBvGykV1KKcYbH6X...