Looking for applicable uses in production, I tried to emulate an effect I'd read about on Damian Allen's March 2019 Post on the website provideocoalition titled: "Hands on with Nuke CopyCat: is it Machine Learning or Witchcraft?".
I also tried to push it a bit further to see where CopyCat would struggle with the shirt example.
Eyes example went nearly flawless. About 4 hours of training with mostly standard settings. I did end the training at 60%, as I saw in the previews it was looking pretty good already.
Shirt example wasn't quite as flawless, and the same issues that appeared in Video 1 appeared here, where similar colours and lack of contrast, coupled with motion, causes the effect to not remain consistent in certain frames.
RTX 2060 | i7-8700 | 32GB 2666MHz
Done in NukeX 13.0v4 in the AIR Copy Cat ML node.