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 Louisiana Bottleneck Blues - Electric 4 String Cigar Box Guitar, 3 String Guitar - Box Guitar Blues - Paris Texas 1918 played on a Cigar Box Guitar, OverDriven - Cigar Box Blues Guitar