OpenGameArt.org
Bossa Shop Theme, in Low-Fi and HD
Credit line
"Bossa Shop Theme, in Low-Fi and HD" by SpringySpringo licensed CC0: https://opengameart.org/content/bossa-shop-theme-in-low-fi-and-hd Author's attribution notice: Credit isn't required, but appreciated. If you use this in any project shoot me a link in the comments!
Where to put it: Game credits or video description. If the entry has a "Copyright/Attribution Notice", follow that.