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 Greg Underwood Guitar Man play's Philly Subway - Part 1 (This guy is dam good) "Reminiscing", Violin by 14 y/o boy, Walnut Streeet 4/4/10 Philadelphia., Philadelphia Subway, see homeless musician playing guitar towards end.