This post seems pretty confused to me. The idea is that you tell YouTube "I own this, people can't use it without my permission, but I'm ok with it as long as you give me a cut of the ad revenue". But with CC-licensed music you have already given people that permission.

It sounds like the author wants to give people the right to use their music freely anywhere but YouTube, which CC and YouTube understandably don't support.

Disclaimer: I work for Google, on open source software that doesn't have anything to do with YouTube.