OpenGameArt.org
Wonderful Transportation 2
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"Wonderful Transportation 2" by Mega Pixel Music Lab licensed CC-BY-SA 4.0: https://opengameart.org/content/wonderful-transportation-2 Author's attribution notice: Please attribute this to Mega Pixel Music Lab and link to my website. https://www.megapixelmusiclab.com
Where to put it: Game credits or video description. If the entry has a "Copyright/Attribution Notice", follow that.