The glaring "floaty" physics is amateur tell hour, I'm actually surprised it's even still an artifact. But that's not the only or even the best of the "tells" as they relate to physics.

Probability, consistency, and continuity are always going to be issues present to some degree for one simple fact:

A camera takes a snapshot of the actual physical universe. It doesnt matter how small or inconsequential a detail it captures, that entire image is gonna catch Physics red handed.

An AI generation is making up everything, all the laws and rules. Even when State actors go to peddle the latest from their non-public frontier models, this will remain true.

Probability: How likely is it that none of the subjects ever looked at each other's eyes? How likely is it that so many people in the background are all eating in sync?

Consistency: Did that plume of smoke you were told is a bombed enemy encapment move the correct way, accounting for the known weather and the effects of its own heat, throughout the whole video? Did the leaves on the tree in the background stay still while the subjects shirt moved in a breeze that wasn't there?

Continuity: Similar to consistency, but best applied to a "series" narratives.

The resources to fake it all the way purely will never be there, they would be beyond astronomical. The human editing needed to seal in those gaps takes some time.

The lies are needed faster than they can be made detection proof.