OpenGameArt.org
"Arcana" by Tadctrl preview
Credit line
""Arcana" by Tadctrl preview" by TAD licensed CC-BY 4.0: https://opengameart.org/content/arcana-by-tadctrl-preview Author's attribution notice: Tad, Hitctrl
Where to put it: Game credits or video description. If the entry has a "Copyright/Attribution Notice", follow that.