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 Main Theme - Pokemon Rumble U Music, Mewtwo VS. Master Core - Smash Wii U, (SDCC) Battlefield - Super Smash Bros. for 3DS / Wii U Music