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 Happy Synthesizer - Flashmob - Fanime 2012, SF Taiko Dojo - 2 - Cherry Blossom Festival 2013, Just Dance Spectronizer - SacAnime Winter 2012