OpenGameArt.org
Children's March Theme
Credit line
"Children's March Theme" by CleytonKauffman licensed CC0: https://opengameart.org/content/childrens-march-theme Author's attribution notice: Music by Cleyton Kauffman - https://soundcloud.com/cleytonkauffman
Where to put it: Game credits or video description. If the entry has a "Copyright/Attribution Notice", follow that.