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 (Original Ukulele Song) Tribute to the Beach by Joe Mueller, (Omnichord/Ukulele Original Song) Brighten Up This World by Joe Mueller, The Ultimate Ukulele Training Routine: Ukulele Harmonica and Treadmill Edition