[Youden]

I don't think it's that music is dominated by a few big labels. Film and television is substantially dominated by a comparably small group of organizations.

The difference is that music licensing has for the most part not been split into channels or subject to exclusive licensing. Music availability has usually been somewhat universal. If one radio station can air a track, most of the others can too. If one store can sell a record or CD, most of the others can too. If one streaming service can stream something, most of the others can too.

With movies and TV, this hasn't really been the case. Typically, one cable TV channel will license the content exclusively, so if you want to consume that content, you need that channel.

The video streaming model we see today is just a natural continuation of the previous business model based on competing through exclusivity. This isn't to say that it makes sense, just that that's the difference of the two.