Jay, while you are at it, please don't confuse "large collections where the composers are almost nameless and faceless" with commercial Royalty-Free Libraries. While the music in these large collection isn't free (licensing fees must be paid), quite a few of these do one or more of the following to guarantee non-interference from the YouTube Content ID System.Reason why this can happen....
A composer's work can change licensing terms, status and rights can change if he sells out or changes label, management or later on signs with a 3rd party agency to collect royalties. Indie artists especially are always looking to get signed. That is why I strongly advise against using music from Bandcamp and Soundcloud. They are most not royalty free as well.
Best to look out for music directly from the composer that confirms that the music will be fully monetizable on YouTube instead of music that is within large collections where the composers are almost nameless and faceless.
A great place to start is of course Incompetech, Josh Woodward, Audionautixs.
My music is fully monetizable as well and I have over 5000+ tracks.
I thought the music that Youtube provide as options when you make a video were free to use and would not cause you issues - yet I used it and still got a copyright claim. What's going on there?
That's one of the reasons I started making my own, plus the rising costs for licensing RF music, which I used to do on a regular basis.I do not monetize any of my videos, so that was not the issue - however the track is no longer listed on Youtube as an option, so I am guessing the composer withdrew from the programme. This makes it very difficult for us. One minute you are using a piece of music that YouTube are recommending you use so you dont get copyright issues, then the next you get a copyright notice. It had not occurred to me that this could happen. I guess the only way to be 100% certain about music is to own the copyright or make totally original music yourself.