[Theodores]

Nobody has forked out a billion dollars for paying people to make YouTube grade videos, if Huawei had a rival service and booked every single ad slot then I think that they could either lose a billion dollars or foster a new platform.

YouTube isn't massively integrated into other services, if you had one platform that did email, video hosting, Patreon things and still image things then I think it could work.

If the on-boarding is with your device, as per how it is with Android then why could it not work?

The goal posts change all the time. Because MicroSoft failed at it doesn't mean they would fail if they did the same today. Or if some other player did.