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 All Screen K.O's in Super Smash Bros. For Wii U and 3DS (As of E3 demo), [Speculation] Zelda Music In Super Smash Bros. For Wii U and 3DS, Fire Emblem Fates - Alight (Storm)