The relevant chain of events that happen during the HRE and end with WWII are what really appeal to me. If anyone can help with the request, thank you!
for WWII : Apocalypse WW2 is pretty good, it details a lot of political events of the war. Soviet storm: WW2 is also good but focusses more on battles.
The BBC is planning to do a lot on WW 1 as it will be 100 years ago this year, that should be fairly interesting as well.
I only really know Dutch documentaries for earlier time periods.