i find the backroom dealings and cut throat politics fascinating, which if it weren't such an unfortunately bleak reality would make a wonderfully juicy fiction.
i'd prefer something a little dry and of good quality, i feel like the bbc's 26 part "Great War" is absolutely the high bar for history documentaries and i wish there were more in this vein
(i know they have something of a ww2 sequel bat that only covers from 34 or so onwards!)
Are you open to any books, not just documentary films? if so, check out In the Garden of Beasts. A great read about living in Hitler's Berlin from 1933-1935