OpenGameArt.org
Reflections Chiptune
Credit line
"Reflections Chiptune" by Pro Sensory licensed CC0: https://opengameart.org/content/reflections-chiptune Author's attribution notice: Just include my name Alex McCulloch. Attribution appreciated but not required.
Where to put it: Game credits or video description. If the entry has a "Copyright/Attribution Notice", follow that.