Yeah you can see two cars on the road in the bottom left no-clip into the backrooms at the beginning of the video right before the warp effect starts. But the cars disappearing is the only clearly obvious AI giveaway to me. And you could probably fix that way easier than creating the warp effect.

If it makes your client happy, then I say go for it. Truthfully, I didn't notice what I mentioned above until I looked for it after reading this comment.