OpenGameArt.org
RPG - A Long Way From Home
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"RPG - A Long Way From Home" by Hitctrl licensed CC-BY 3.0: https://opengameart.org/content/rpg-a-long-way-from-home Author's attribution notice: HitCtrl
Where to put it: Game credits or video description. If the entry has a "Copyright/Attribution Notice", follow that.