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 Watchmen OST - "Pruit Igoe & Prophecies" by Philip Glass (on piano), Tutorial - "Ashes" (Halo Reach theme) on piano, Astro Boy (鉄腕アトム) theme on piano