OpenGameArt.org
Rocking in the rocking chair
Credit line
"Rocking in the rocking chair" by Pro Sensory licensed CC0: https://opengameart.org/content/rocking-in-the-rocking-chair Author's attribution notice: please include my name in your projects credits, Alex McCulloch.
Where to put it: Game credits or video description. If the entry has a "Copyright/Attribution Notice", follow that.