Nope.. You did not "created" it. You just rendered some pics and lyrics with the audio track i think. That's a difference. It's not your creation and you don't own it.
Your video must have been claimed by bots.. They verify new videos to see if it fits any of the big label songs. Once they claim your video, labels can make money of it, by showing ads on it, even if you agree or not. No money goes to the artist..at least not directly.
If Youtube wouldn't have this sort of copyright policy they would get sued by all major labels, producers, etc.
If you want to make a dime on it, you must claim it's yours . Here's how:
http://www.youtube.com/watch?v=LEi1cSUsmKA
Sign with your real name.
False information can get you banned. Be aware of your statements.
The reason why this works: it's pretty much the same as radio stations air any song they want. They usually give credit to the artist and thus promoting him for nothing in change. And then they place silly ads = money.
+If you're partnered directly with adsense i think you need to complete a sort of form when you try to monetize something,right?(maybe things have changed,lol) In a network you don't need to do that, and nobody verifies your monetized content, and if you really do something wrong they'll just ask you to remove monetization. This is the pro of networks..the con is that you need to split the revenue with them.something like 70you/30them%
btw, labels do pay for promotion of their artists. This is how gangnam got big..and not just psy, but also Skrillex, Gaga, Adele and some of my fav artists. They all use mobile views, and i bet they use the money made from claiming 3rd party videos to fund this mobile view exploit services. Pretty neat huh? Then stupid ppl think they're big, but in reality they aren't THAT popular
But that's just my conspiracy theory heh..
