Also typically what's done is done, which only reinforces how important it is to get a grip on your content early. It's not difficult to do, there are many tools and bits of info online, if you need specific help maybe I could point you in the right direction via pm.
I don't think this applies in this case as FireMike is not the creator of the music and/or has got approved my the musicmaker to use the actual music in his video. (I'm taking a wild guess on that you haven't made the music Mike )