It doesn't matter - while the device is connected to CarPlay, it limits features. There's no way around that. Facetiming and driving or watching a video and driving are just not safe things to do together. You saying "im looking for a real solution and that's not it" just shows that you're being ignorant to the fact that doing this can harm other drivers on the road and Apple is doing its best to mitigate this from happening. It's not gonna change.