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 "Guitars & Fretted Instruments" Episode #20 Preview - Quaver's Marvelous World of Music, "Rock" Episode #28 Preview - Quaver's Marvelous World of Music, "Writing a Song" Episode #12 Preview - Quaver's Marvelous World of Music