Original songs free of Copyright (free use) for anything you need ... but there are conditions:
1] Preferably give me credits (so that more people know about my channel and more people use my music)
2] If you are going to modify it or something like that, contact me by e-Mail (clopezcastro78@gmail.com) to be able to keep track of it.
3] You cannot REUPLOAD the song or use the video clip that accompanies it
4] If your video violates serious YouTube rules, I will ask you to remove my music