The situation, as I understand it:

Vlogging Through History is a channel which originally focused on vlogging at historical sites, but has since shifted to reactions to history videos. I think the only thing you really need to know is that he really, really, *really* does not like Woodrow Wilson.

Monsieur Z, meanwhile, is a far-right political commentary channel (he once compared racial diversity in America to the collapse of the Austro-Hungarian Empire, I'm told.) He made a video in which he attacked claims by Mr. Beat, another channel which mainly makes content about US history and the government, in particular arguing that Woodrow Wilson did nothing wrong. 

Now, it's worth noting that Wilson was a mixed bag-on the one hand, he, of course, laid out his Fourteen Points in the Treaty of Versailles, and was the last of the three presidents of the Progressive Era, presiding over reforms such as the Nineteenth Amendment. On the other, he was *very* racist, even for 1910s America, and his presidency reflected that as well.

VTH made his own reaction video defending Mr. Beat-who, it's worth noting, is something of a friend of his; in fact, a few years back, they did a livestream in which they ranked US presidents for President's Day, which was when they learned about the Russian invasion of Ukraine. Monsieur Z responded by making a similar video attacking VTH. This is VTH's response to that video.

I also learned while doing this write-up that Monsieur Z made his own video about "the truth" of this response video, but right below that, I saw a video about how the US can convert Israel to Christianity and restore the Kingdom of Jerusalem and then another one about why the US absolutely should annex Canada. I'm not linking that.

Response by Vlogging Through History to Monsieur Z