It's telling that Apple isn't able to persuade American content corporations into DRM free videos either. They're now biggest supporters and implementors of locked down DRM across their device portfolio.
The music industry was so terrified at what internet piracy was doing that they agreed to Apples terms. The film and television industry saw what Apple had done to music, and were terrified of what it would do to them. They held onto the only playable card they had.
