OpenGameArt.org
Frivolous Hero
Credit line
"Frivolous Hero" by Alexandr Zhelanov licensed CC-BY 4.0: https://opengameart.org/content/frivolous-hero Author's attribution notice: Alexandr Zhelanov https://www.youtube.com/channel/UCxmng6_DMIayDwkiWGVzVRQ?view_as=subscriber totalnomus@gmail.com
Where to put it: Game credits or video description. If the entry has a "Copyright/Attribution Notice", follow that.