Comment by skeaker

The flaw with this angle is that their success can be attributed to momentum rather than any good decision-making. They have no real competition for long-form video content. If they make a terrible decision, they can still be successful as their market has nowhere else to go to.

That is to say that "If you don't like the service, you can stop using it" isn't really true if you want to watch long-form videos on the internet. There isn't an alternative.