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 "Mario's Brother" - Fun Study Piece for Double Bass, Phrasing With the Bow - Lauren Pierce Lesson for Discover Double Bass, D'Addario Zyex Double Bass String Review by Geoff Chalmers