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 Piano Instruction: "Flamenco" by William Gillock, rolling motion, Piano Lesson: Schumann Traumerei fingering and voicing all the way through--very slow tempo, Piano Instruction: Phrasing, Shirley Kirsten, Teacher