Do what are the symbols of progress here? The woman in the center seems to be commenting on the progress rather than depicting the progress itself, she she seems to be loving it.
For actual symbols, we have planes, skyscrapers, a fort, a chemist, the world and an engineer.
I can see how all these depict progress, but the fort seems to be overly racist. I can only understand this as the conquest against the native Americans which is depicted positively here. But I guess that's just how people thought back then.
If he did, he likely did that before it was possible to create photorealistic digital clones. Then it's an interesting question about how US contract law works: are you able to agree on something that is not possible at the time of signing?
Surely, if the contract would contain some explicit clause about that. But if it just said some like "we can do anything we want with the video material", then it's probably less clear.