[pooper]

> As for your last point, that does sound broken. Perhaps the content owner of the song you used decided that they didn't want people using it on YouTube after all?

Can one revoke a copyright license like that? If one did, would that song still be available on YouTube Video Creator for new videos? Also, how does one be certain in the case of classical music whether one owns performance copyright to it without introducing a certain deviation from the score (defect or flaw if you will) in the musical piece as a fingerprint? I'd imagine if YouTube used an audio score in its tool, it has obtained some sort of a global, perpetual, irrevocable blah blah license don't you think?