I'm going to say, I remember something Kawhi said, but don't remember it fully so hopefully I get it right/am remembering right. He said the difference between himself and a lot of other players is, he practices/works on things he wants to learn/use in games, then he is able to apply it in the actual game. He said a lot of players do some great things in practice, or practice certain/specific things, but can't seem to be able to do in actual games. It's an interesting point he brought up. Some people just can't apply it to game time situations no matter how much they practice it. I wonder if it's because of the pressure/bright lights, or they just can't do it when playing against real opponents. I remember guys like Dwight Howard working with Hakeem, but I never really saw that translate to him being able to do it in games. Kawhi was saying he practices it, and then is able to do it in games.
I don't know what Victor works on in practice, but it does seem like he's doing a lot of improvising on the court. Not sure if you can become great doing that. I mean, this isn't sports, but there are some great musicians that improvise and are great, so maybe Victor can be too doing that (again not sure if that is what he's doing, and/or if he's done some of the stuff in practice, it just looks that way to me that he's trying stuff on the spot during a game).
Overall all, though, I agree with your point about learning/working on things in practice and then doing it in a game. Steph Curry said he practices shooting sped up/faster in practice, so that when he shoots in a game, he's able to shoot slower and it makes it easier for him.