I would recommend anybody not to license in a CC license that includes "NC" as long it is not clearly defined what you mean by "commercial".
- Is using the music in a private YouTube video commercial (probably not)?
- Is using the music in a private YouTube video that, say, some 3D-Designer rendered for a classroom project commercial?
- Is using the music in a YouTube video that some 3D-Designer rendered for a classroom project but with the potential of showing his skills to potential employers commercial?
- Is using the music in a YouTube video that some 3D-Designer rendered for some funny private side project with the potential of showing his skills to potential employers commercial?
- Is using the music in a YouTube video that some 3D-Designer released for free to show his skills to potential employers commercial?
- Is enabling ads on such YouTube videos commercial? What if you enable ads because you had costs?
- Is using the music in an advertising video that is distributed only freely commercial (rather yes)?
- Is using the music in a commercial film commercial (clearly yes)?
If you say something is commercial if you get paid for it, what other types of compensation makes it commercial/non-commercial: YouTube clicks, Facebook likes, Bitcoins (when they had no value), attention for other (advertized) videos in your YouTube channel, awareness among potential employers?