I did a reverse image search and found it posted to Reddit in 2020—i.e., before the rise of AI image generators. And who knows how long it existed before that post. (Because the OP was not the artist.)

More to the point though: don't make accusations without clear evidence. It is far better to let one guilty AI user go than to falsely accuse a real artist and potentially tarnish their reputation unfairly. As someone who has been falsely accused of using AI in far lower-stakes contexts, it really fucking sucks. And I can only imagine it would be far worse if it happened to someone in the line of their professional work.

In this case, the artist is called Annie Stegg Gerard, and she can be seen painting oil on canvas on her website.

Just because it popped back up for me again just now, after I first watched it a week or so ago, I found this perspective to be a good one. It's about text, rather than images, and I think personally "vibes" can have a bit more place in images than in text, but the overall message of giving people the benefit of the doubt (especially when it's a person and not a large corporation) and not trusting the same types of tools that generate slop to be responsible for detecting it, is crucial.