OpenGameArt.org
Hanging in the Black
Credit line
"Hanging in the Black" by VishwaJai licensed CC0: https://opengameart.org/content/hanging-in-the-black Author's attribution notice: If you credit, credit to Vishwa Jai. If you don't, that's cool too.
Where to put it: Game credits or video description. If the entry has a "Copyright/Attribution Notice", follow that.