Television

You could make a movie about George Washington, and cast Ildris Elba in the role, and it still wouldn’t matter. The actor being black only matters if you refuse to recognize that acting is all playing pretend.

I have no particular comment or specific interest regarding Harry Potter anymore, but I will add that the actor cast for Snape (Paapa Essiedu) is very strange. I watched him in The Lazarus Project and he just doesn't really seem to have any snape-like tendencies.

Now, you want something that matters? Try refilming Roots with Chinese actors. That’s a massive mountain of disbelief to climb over. And it bypasses the story as a story of African people being stolen from Africa and enslaved. It could be done, but the story itself is so intrinsically tied to the black experience in america that trying to excise that part would make it almost impossible to immerse into, regardless of the ethical questions of negating black representation on screen.

I mean, there's Warrior (2019) here if you want something like this. But I would add on an adjacent note that if I was watching a TV show set in Joseon Korea, I would expect it to be 99.9% Korean ethnicity (or people who could pass) and anything less would take me out of it.