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 Let's Play de Blob Part 30: Water Tanks, Styles, Colors, and Mold, Let's Play Super Luigi Galaxy Part 52: A Galactic Octopie that Lives in Lava that Wear Crowns