videos in AudioSet
A list of about a million ten-second YouTube clips, each labelled with the sounds in it, that Google published in 2017. Labs use it to train and test general audio and music models.
Including Battletoads & Double Dragon NES Music 4, The Flintstones 2 - The Surprise at Dinosaur Peak NES Music 3, Twin Bee NES Music 1 (Without intro)