I see this differently. The streaming services will not be allowed to supply ala carte content very much longer. The industry will not allow it. The large production companies will start buying out the people that supply the web access to the streaming services, in not the services themselves.
Right now there is Amazon and Netflix. I would bet on a hostile take over of Netflix sooner than later. Neither of those two companies is interested in independent content that they can’t control.
Answers to your assertion:
YouTube, Vimeo, DailyMotion, ... ad infinitum.
Whatever industry you’re concern-trolling about, it is not going to take over the internet.
Trump just said a day or two ago, that if he is President, he would NOT approve this merger, as it is monopolistic, and there will be nothing but large monopolies controlling most of the MSM (a total of about 6 of them). Watch your bills go up and up.