Matt, to me Mark Felton's little videos do just touch on a small pieces of any historical subject that he does a presentation on, usually the little nuggets that capture the attention of many viewers, even if that isn't a time period where their own interests lay.
I do find them entertaining and he has over two million subscribers, so he must be doing something right.
Yes he certainly does a lot of WW2 related presentations with many being on German topics, funnily enough it's the same with our hobby, with German WW2 figures and vehicles being the best sellers for manufacturers who cover the period, so there must be an attraction, in us too, to WW2 and Germany in particular, whether it being people interested in watching and listening to a Mark Felton video or collecting and displaying a scale model of a German Panzer !
Personally, I'm not a fan of AI generated videos that seem to be swamping youtube now, having watched a few and finding simple mistakes in them, that anyone with a little knowledge of the subject would notice, but anyone new to it, might take as true, so to me AI is not to be trusted in that roll.
Those being produced after research, even may it be limited to what the video is about, such as those done by Mark Felton or the shorter and more movie associated ones of Johnny Johnson, are more entertaining and better in other ways than AI ones.
If you want high level, I won't say unimpeachable history, as that can suffer just as much from what's been omitted, as to what's actually said, but encompassing all sides of the narrative, AI generated ones are to be avoided.