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 Recorder Lesson: Laoise O'Brien: 5 Performance Preparation - Andriessen Ende, Violin Lesson: André Swanepoel: 1 Technical Exercises on Bowing, Violin Lesson: Keith Pascoe: 3 Technique for good legato in a Mozart cadenza