markkaz
I Love YTtalk
@PressRecord posted good info. As for being annoyed...
Right now, YouTube is dealing with all of these content companies complaining that YouTubers are using their copyrighted material. These companies are annoyed as well.
In order for YouTube to show that they are addressing the issue, they have ContentID in place, which is how they detected you using music for which you don't own.
I suspect that you have used other music and YouTube removed the video and gave you copyright strike. Check this link to see how your channel stands.
https://www.youtube.com/features