I've been binge watching it for the last week and I'm hooked. It's certainly well-produced and it seems well-researched.
I haven't seen enough of their videos to comment fully, and it seems to be focused on areas that I would know less about in any event, but from what I have seen their videos seem to be very focused on technical military history. So videos like "The French Uniforms of World War I" and "Who laid the barbed wire in no-man's land?"
Even just looking at some of the actual titles it also seems to go in for a lot of pop-analysis: "Top 11 Stupid Moves of Early World War I".
I decided to watch the one I know most about: "Splitting up the Middle East". and ummm, maybe he mislabeled the video or I'm misunderstanding the format, but I watched all of it and maybe 20 seconds had to do with a (not very good) summary of the division of the Middle East. Surely it would be important to note that the reason why the British wanted control of Basra wasn't to deny the Russians access to the Persian Gulf but rather because Basra was the only deep-water port to export Persian oil, which was the only such source of oil for the British navy? Even for a technical war time "history" I would think that would be a pertinent bit of analysis.
Also any time you include the line "Ok, when I was researching this episode, I found a reference on a Wikipedia page that said..." You're not exactly helping your credibility. He does then say something like "it was only wikipedia" but, yeah, that made me shake my head.
I like the show, but I don't like the regular weekly history (not that it's bad history - just not my interest). I love the whole "100 years in the past" idea though, just too particular for my regular interest. Perhaps I'll be more interested in 2017 when the US finally joins the war. What I do watch regularly is his "out of the trenches" and topical episodes. Normally there is a wealth of sources that he is pulling from, though almost entirely secondary. He does give a bibliography in the description, but without any specifics which can be a bit maddening. It's great in comparison to shows like Crash Course, Keith Hughes, or any show meant to be a teacher replacement.