I agree about this part, it's kinda scummy to imply in their name that they are not french, especially if they feel like french. They have that right and nobody should question that. For me, that's the biggest problem about that video, it's just scummy behavior.
However, if you did poll among black french players, I wonder how many of them would say they were sudanese, congolese, cameroonian or whatever nation and wouldn't even mention france. I think some of them that are currently outraged would definitely do that, and it's hypocritical imo. In this case, I only feel bad for the french players that actually got offended for that, like they legit love france, and they feel bad when someone questions their allegiance to it and not this other type of players I mentioned.