IgnacioDavila what you just told us about storage is not a good news. You basically said Stream storage pool will not get added into SharePoint pool of storage. Instead, videos will share the same SPO pool of storage. A decent size video is at least few 100s MBs in size, and a few large videos can eat up a good junk of storage from the pool. Currently in Stream classic has its own pool of storage, and SPO has it’s own pool of storage. MS needs to add the Stream storage into SPO pool of storage.
And for OneDrive - yes, there’s documented process but it’s problematic when someone leaves the company and then trying to figure out who’s should own that OneDrive and there’s privacy concerns with users personal OneDrive content. Any item that should be used by many folks for long term should not be stored in OneDrive - they should go to SPO site or Teams.