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 Rainy day at DCA Takeoffs and Landings 2/10/12, Piper Arrow, Manassas Airshow 5/12/12, Osbourn Park High School Graduation 2008