Is Indy Neidell severely biased? No, I don't think so. When someone does something fundamentally wrong, he tends to call them out for it. Look no further than his coverage of Enver Pasha, who wasn't just incompetent but maliciously incompetent. And we see his criticisms aren't simply reserved for the Central Powers when he calls out the Allies for their violation of Greek neutrality.

With regards to the channel's information? They share their sources on a regular basis and, I have to admit, I certainly enjoy it when they mention a book I've got on my shelf. They also have a few go-to sources they use on a pretty regular basis (Keegan's First World War comes to mind for what should be obvious reasons). While I'm sure they've gotten things wrong from time to time, simply because of the sheer volume of videos they've produced in the past two years, I don't recall anything that was particularly blatant (though I haven't seen every episode, so take that with a grain of salt).

But I think it's important to remember that Indy Neidell and John Green are aiming at very different audiences. Green's essentially putting on an act. If you were to look at Green's video on the Syrian refugee crisis, for instance, we see a much more somber video -- one that's closer to Indy's own video style (and, on the other hand, Indy embraces the silly on his Out of the Trenches series).

But to return to the question posed in the topic title: I think the Great War channel is absolutely fantastic. In addition to the gimmick (Indy aims for a sort of in-character account of the war, as it unfolds, with a pseudo-omniscient understanding of then-current events, all a century after the fact), it deals with a subject that is both powerful and relevant to the modern world and which is simultaneously forgotten by so many people, overshadowed by an even more horrific war that flared up two decades later. Given all of the things about the series I like -- the neat premise, the oft-overlooked subject material, the generally excellent research that goes into the episodes -- I'm willing to overlook the handful of pet peeves that I have with the series.