The odds are far higher it’s somebody who knows very little about anything but wants to make money from the gullible.
https://www.youtube.com/@MedievalWay
Here's a sample video.
https://www.youtube.com/watch?v=wKdKr4VONc4
I suspect the voice is AI, the thumbnails definitely are, but unsure of the rest of the content. It's really interesting and the content in the video seems legit (looked up the "forgotten vegetables" and was surprised to find that we did forgo a lot of tasty things to satisfy the machine harvesters).
Guessing it's likely a phd student with too much time on their hand.
But why are you glad? There's no intrinsic right to be popular on YouTube, or to be successful. There's also no lack of YouTubers making interesting videos. Why not let a "natural selection" of sorts weed out these people who lack the charisma or whatever to make videos without AI?