Thanks for the reply.
Have you watched the video? The camera points at the center of both two characters but if you give it a second of thought, using THAT rotation makes no sense, because as the players stray away from each other, “up” should start to be slightly different but there is no way to update that using only camera rotation since it is just rotated towards an indiferent point.
I can try to explain this more if it is not clear. Let me know.