I'd like to preface that I like AI content for my own amusement and sometimes for convenience. I think it's neither the best nor the worst thing to ever happen to the world like so many lemmy users seem to.

Current state, most AI generated content (images, video, even text) have some general tells. For text, they tend to lean on certain phrases and formatting. Picture and video both still contain noticeable artifacts that give it away, though that is becoming less prevalent over time. They're a lot more noticeable when you use the tools yourself and trying to overcome the patterns is difficult without manually intervening.

I think you have to ask yourself what degree of human involvement is the cutoff for you. Is it only 100% non generated content? Even prior to the sudden llm push, that would be really difficult to find. A lot of software, photoshop and predictive text for example, have used machine learning to improve their algorithms for years. It's not likely you'll find anything unassisted anymore. What degree of human made modifications AFTER something is generated is enough to consider it good enough? If I start with a generated image but significantly modify it with an image editor to fix issues and finalize the 'vision', is that enough?

I personally think you'll have to create your own compass. Bad content is bad regardless of how it's made. If you cannot tell the difference if a human made it or a machine, does it really matter?