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 Time Lapse of Clouds -with relaxing Classical music, The Explorium's Yosemite Adventure -- with beautiful. great, relaxing Classical music, Very cute baby ducklings - with beautiful, relaxing Classical music