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