Unless you're a very big player handling excessive amounts of users, the bandwidth involved doesn't need to cost an arm and a leg.

I can see why private individuals might prefer something free, but for organizations or other professional actors which are publishing high-quality video-productions, they already have a budget, and frankly the BW cost is probably going to be the smallest expense on their list.

And when they risk losing their platform and audience at a whim (as we've seen Google do repeatedly to certain types of organizations over at YouTube), I can't see why more people don't consider other options which leaves them in full control over their own content.