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 Super Smash Bros for Wii U #102 - Clearing the Challenge Board #1, Super Smash Bros for Wii U #142 - More Crazy Orders, Super Smash Bros for 3DS Gameplay #6 - Samus v Donkey Kong