OpenGameArt.org
NES - Bach - BWV 565
Credit line
"NES - Bach - BWV 565" by TheOuterLinux licensed CC0: https://opengameart.org/content/nes-bach-bwv-565 Author's attribution notice: Public Domain (CC0) No Attribution Required ♪~ ᕕ( ᐛ )ᕗ -- But if you would like to give "TheOuterLinux" credit for the conversion/editing, that would be awesome.
Where to put it: Game credits or video description. If the entry has a "Copyright/Attribution Notice", follow that.