People produce videos hoping or expecting to be monetized. People who monetize videos (by advertising or sponsoring) do so hoping for the audience to buy some product or service. People who host videos do so expecting to be paid by the monetizing people. That's how the current economic model for ad-supported video works.
A machine learning model is not an economic actor[1]. It's not going to go out and buy a flat wallet or a new set of headphones or whatever else is being advertised on stream. So the current economic model under which that content produced (which is predicated on the assumption that the audience is human) totally falls apart if the audience is an ML model.
[1] yet. And even when they routinely can take part in economic transactions they aren't the audience the advertisers are paying to reach.