OpenGameArt.org
Icy Cold Blues
Credit line
"Icy Cold Blues" by Spring Spring licensed CC0: https://opengameart.org/content/icy-cold-blues Author's attribution notice: Produced by Julie Damsgaard/Spring Spring/Spring Enterprises @ https://spring-enterprises.neocities.org
Where to put it: Game credits or video description. If the entry has a "Copyright/Attribution Notice", follow that.