Well it is monopoly abuse.

How? They have bargaining power with a monopoly share. But it really saves bandwidth and avoids patent fees to unrelated companies. What part is the abuse? Should they have to support mpeg1 too if someone wants to use an old chip at enormous bandwidth costs?

If it is about their DRM and not their freely licensed VP9 then I could see where it get into abuse if competitors can't use it. And I see where standing up the music service using youtube and messing up the system voice search is abusive.