I am aware that guest sharing will be available in Stream eventually (no ETA). However, I am looking for a different solution. I have an enterprise customer who is a conglomerate or group with several companies. They want to implement group-wide video portal using Stream. However, there are about 5 tenants in the group. Is it possible to implement Stream in one tenant (60% users covered) and then give access to other tenants' users? They do not want to share individual videos with specific users, but grant access at tenant or AAD level for all users in those select tenants. In fact, they want to prevent videos being shared by users (employees) to external people (outside the group).