Can you make it more precise? Does it mean "there exists at least one AI video indistinguishable from reality", or "most AI videos that are used in practice are indistinguishable from reality", or "on any prompt, any resulting video is indistinguishable from reality"? And, how do you define "indistinguishable from reality"? Some sort of Turing test? If so, what kind of real videos and what kind of AI videos are allowed in it? (e.g. real video of blank white wall vs. AI video of blank white wall is not very interesting.)

On 90% of prompts, any resulting video will be indistinguishable from reality. By indistinguishable from reality I mean if you game someone an AI video and a real video of the same thing they wouldn't be able to tell which one is fake.

Maybe better to write "Will AI video be indistinguishable from the real thing"?

Would this person be a trained eye or just a random person, as a trained eye would be far more capable of picking up on the inconsistencies produced by generated content.

Just a random person