OpenGameArt.org
Zero Zero Zero Zero
Credit line
"Zero Zero Zero Zero" by Alexandr Zhelanov licensed CC-BY 4.0: https://opengameart.org/content/zero-zero-zero-zero Author's attribution notice: Alexandr Zhelanov https://soundcloud.com/alexandr-zhelanov
Where to put it: Game credits or video description. If the entry has a "Copyright/Attribution Notice", follow that.