OpenGameArt.org
Bebop (Chiptune)
Credit line
"Bebop (Chiptune)" by Pro Sensory licensed CC0: https://opengameart.org/content/bebop-chiptune Author's attribution notice: just include my name, Alex McCulloch. This is not mandatory.
Where to put it: Game credits or video description. If the entry has a "Copyright/Attribution Notice", follow that.