Here’s a list of sites that allow you to download and use their music for free on YouTube and other sites!
Free Music Site Link
Incompetech | Free Music
Nathan Wills Music | Free Music and Music you can buy
AudioNautix | Free Music. Totally. No Copyright Hassles.
TechnoReabit (YouTube Channel) | Free Music
MUST LEAVE CREDIT
Sound Jay | Free Sound FX and Music
Dano Songs Royalty Free Music & Songs
That’s all the sites I’ve found so far. If you know of any other sites please contact me by clicking here.