Inspired by this post I spent a couple of hours today trying to set this up on my toy server, only to immediately run into what seems to be a bug where <video> tags loading a simple WebM video from right next to index.html broke because the media response got Anubis's HTML bot check instead of media.
I suppose my use-case was just too complicated.
The user who posted that posts a lot of stuff that's not AI, so I expect they just saw that picture somewhere and reposted it not realizing it's AI. It can be difficult to tell sometimes and will only get more difficult as time goes on.