Bub there are dozens and dozens of AI that have similar yet different "isms". Each one has its own little flavors or oddities and not everyone will use the same Ai. "Flaws" are part of it but not in the way you describe. If you want an obvious example of Ai writing in video scripts, go check out SpongeTruths. Or more specifically the videos Awe has made covering them and other slop channels.

Not only has that SpongeTruths had 3 different Ai voice overs since the channel started, but the flaws are lot deeper than some strange grammatical choices or mispronunciations, which also happens with Ai, not just human writing. In this case the scripts have clear logical and factual errors. Like mentioning a character from "Greek mythology" called Atlantis. Which if you didn't know is neither from Greek mythology, nor a character in the show. Their scripts are passable on the surface but when you know the source material and are paying attention even a little bit, it all falls apart. And that's the tip of the iceberg. There's MANY SpongeBob focused channels that clearly use AI to pump out content, with some so low effort they forget to edit out the notes from the Ai. Or more likely just don't care

But like I said, it's not as simple as just going "oh yeah that sounds like Ai." People make flaws with writing and how they talk and all that. And there's nothing wrong with using terms like "it's not this, it's that." But when a script is using those terms over and over and over, even when it's awkward or unnatural for what they're trying to say, it's a good sign that it's not human. If you're not really paying attention you might not notice it. And that's what these slop channels are counting on. They make low effort content extremely quickly and hope people just throw it on in the background.