OpenGameArt.org
"Training Is Over" (RPG Orchestral Essentials) - Battle Results Music
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""Training Is Over" (RPG Orchestral Essentials) - Battle Results Music" by InspectorJ licensed CC-BY 3.0: https://opengameart.org/content/training-is-over-rpg-orchestral-essentials-battle-results-music Author's attribution notice: "Training Is Over" Composed by Jonathan Shaw (www.jshaw.co.uk)
Where to put it: Game credits or video description. If the entry has a "Copyright/Attribution Notice", follow that.