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 Heavy Metal - Los Osos HS Percussion Ensemble 2011, Teen Pulse - Grove - Barnes & Noble Performance 11/21/11, Teen Pulse Bucket Brigade at Barnes & Noble 3-21-12