OpenGameArt.org
Continuum (Alternative)
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"Continuum (Alternative)" by onemansymphony licensed CC-BY 4.0: https://opengameart.org/content/continuum-alternative Author's attribution notice: Composer: İlker Yalçıner (ilkeryalciner.com)
Where to put it: Game credits or video description. If the entry has a "Copyright/Attribution Notice", follow that.