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 Ballet Exercise - Battement Fondu - Perfect Music for Ballet Class, Music for Ballet Class Grand Allegro 3rd Shade Variation from La Bayadere, Music for Ballet Class Vol 5 - Inspiring Classical Music for Ballet Class