OpenGameArt.org
LOOP BOX #1: Beats for RPG, Platformers, Visual Novels, Adventure, Puzzle Games, Simulators, Menu Screens and Cutscenes
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"LOOP BOX #1: Beats for RPG, Platformers, Visual Novels, Adventure, Puzzle Games, Simulators, Menu Screens and Cutscenes" by Of Far Different Nature licensed CC-BY 4.0: https://opengameart.org/content/loop-box-1-beats-for-rpg-platformers-visual-novels-adventure-puzzle-games-simulators-menu Author's attribution notice: Music by Of Far Different Nature (https://fardifferent.carrd.co/)
Where to put it: Game credits or video description. If the entry has a "Copyright/Attribution Notice", follow that.