OpenGameArt.org
Gentle Lullaby Loop
Credit line
"Gentle Lullaby Loop" by frances licensed CC-BY 3.0: https://opengameart.org/content/gentle-lullaby-loop Author's attribution notice: Music (Gentle Lullaby Loop) by Frances Calceta
Where to put it: Game credits or video description. If the entry has a "Copyright/Attribution Notice", follow that.