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 Stone Mountain BlueGrass Roots - Survey - Short Clips of Performances, Stone Mountain Bluegrass, Old Time Music & Country Dance Festival 2011, Contra Dancing - Elixir - Blue Eyed Lady & Back Door Slam