OpenGameArt.org
The Next Level(Adventure track)
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"The Next Level(Adventure track)" by Human Antagonist licensed CC-BY 3.0: https://opengameart.org/content/the-next-leveladventure-track Author's attribution notice: created by Human Antagonist soundcloud.com/humanantagonist
Where to put it: Game credits or video description. If the entry has a "Copyright/Attribution Notice", follow that.