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 FSX Time Lapse: WoAI Traffic @ Singapore Changi Airport (WSSS), Mixcraft 5: "Hot Air Balloon" by Owl City [Instrumental], Mixcraft 5: "Strawberry Avalanche" by Owl City [Instrumental]