OpenGameArt.org
The Invisible Gardener
Credit line
"The Invisible Gardener" by northivanastan licensed CC0: https://opengameart.org/content/the-invisible-gardener Author's attribution notice: MIDI "The Invisible Gardener" by Ivan Stanton (northivanastan)
Where to put it: Game credits or video description. If the entry has a "Copyright/Attribution Notice", follow that.