It’s actually easier than you think to tell an AI voice. Ignoring the tell tale occasional small mispronunciations or misapplication of emphasis, they sound “too perfect”. The voice and cadence are too perfect. And the voices start to grate after a while.
One way to tell if the script is AI generated is if it repeats the same facts over and over in different ways. Leads into a section relating facts from the last section. Without ex apples on hand it’s hard to explain but once you figure it out you start noticing it more and more. Note that this is discussing the scripts themselves and not the actual narration.
Yep.
Though, if you read one of my first drafts you'll find the same repetition - even when I don't use the AI for word generations. I repeat things. Even after I send the revised MS to my editor, she'll flag more repetitions.
I actually used AI for a major assist to get back in the writing saddle after my mother's passing. I'd just attended an author conference where the Future Fiction Academy (FFA) array of authors using AI and creating tools (Raptor Write, My First Draft, Rexi) to help authors do just that.
The cheap and cheesy content creator doesn't edit the stories. They pump and Dump.
The FFA style author uses a different AI to locate the issues like repetition, the same names (some of the names that AI spits out for new characters link back to their development team

. ) Then the author read what had been generated and starts their own editing process/rewrites.
It's a three or four hour deep dive just to see how smart authors are using AI in their processes for creating a book.
We're seeing a lot of badly generated AI content that is pushed out without those checks. In both the Content Video Creator, as well as the Author spaces. But I can point you to books with strong AI use you'd be hard pressed to point to consistent issues in the manuscript.
It looks like some of these newer YT channels are doing some rudimentary editing.
We're both on the same page on this: 
It's the LAZY content producers that are using the tools to pump out content. The WW2 channel above, it's pretty darn close to decent, with a few piddly details off (37mm M5 vs 2 pdr). As long as there is a human checking the AIs involved, I'm comfortable consuming the content. I wouldn't write a research paper based on what they produce, but it's decent entertainment.
FYI: Using the AI to write that one book, right after Mom died, showed me that I enjoy wording the words too much. I now use the AI as an Ideation partner, and analysis tool.
I create a basic concept, then start talking to Chatty to flesh it out. Once we've got characters, and major plot points, I start wording the words.
I write based on the ideas I developed bouncing concepts off Chatty. I'm not on the book-a-month train like some other authors (or worse if they pump-n-dump). But, I'm no longer calling other authors for ideation help and wasting hours of their time.
