OpenGameArt.org
Alert Music
Credit line
"Alert Music" by Muerteloca12 licensed CC0: https://opengameart.org/content/alert-music Author's attribution notice: If you want you can mention me as TheGrimdarkStudios although I would prefer a link to: https://play.google.com/store/apps/dev?id=6484105788238044544
Where to put it: Game credits or video description. If the entry has a "Copyright/Attribution Notice", follow that.