https://www.instagram.com/reel/DO9MwTHCoR_/?igsh=MTZybml2NDB...
The screenshots/videos of them doing it are pretty wild, and insane they are editing creators' uploads without consent!
To me, this clearly looks like a case of a very high compression ratio with the motion blocks swimming around on screen. They might have some detail enhancement in the loop to try to overcome the blockiness which, in this case, results in the swimming effect.
It's strange to see these claims being taken at face value on a technical forum. It should be a dead giveaway that this is a compression issue because the entire video is obviously highly compressed and lacking detail.
If your compression pipeline gives people anime eyes because it's doing "detail enhancement", your compression pipeline is also a filter. If you apply some transformation to a creator's content, and then their viewers perceive that as them disingenuously using a filter, and your response to their complaints is to "well actually" them about whether it is a filter or a compression artifact, you've lost the plot.
To be honest, calling someone "non-technical" and then "well actually"ing them about hair splitting details when the outcome is the same is patronizing, and I really wish we wouldn't treat "normies" that way. Regardless of whether they are technical, they are living in a world increasingly intermediated by technology, and we should be listening to their feedback on it. They have to live with the consequences of our design decisions. If we believe them to be non-technical, we should extend a lot of generosity to them in their use of terminology, and address what they mean instead of nitpicking.