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 Justin Bieber - One Time (Acoustic Guitar Cover) - by 9 year old Shon Burnett, One Direction - Best Song Ever (Guitar and Piano Cover) by 11 year old Shon Burnett