OpenGameArt.org
The road we use to travel when we were kids
Credit line
"The road we use to travel when we were kids" by Loyalty Freak Music licensed CC0: https://opengameart.org/content/the-road-we-use-to-travel-when-we-were-kids
Where to put it: Game credits or video description. If the entry has a "Copyright/Attribution Notice", follow that.