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 Demented Video Game Music #25: Twinkle Twinkle, Awesome Video Game Music #50: The Legend of Zelda: Twilight Princess Dungeon Boss Themes (Part 3), Demented Video Game Music #7: Ikana Valley