I don’t think it’s unreasonable at all to argue that YouTube has an effective monopoly in the video sharing space. Yes, there are certainly other platforms — Vimeo, Rumble, etc. — but purely in terms of reachability, YouTube absolutely holds near-absolute reign here. Trying to effectively monetize video content on other platforms, from what I understand, is extremely unlikely for the vast majority of creators.
And while there’s a valid counter-argument in some of the numbers creators on X have put up (e.g., Tucker Carlson), those are really the exceptional cases.
I could see Brand going straight over to X, but I don’t know if that’s sufficient to really argue that YouTube isn’t effectively a monopoly in the space.