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 New Korean War Commander; B-60 Bomber, 1st Pics 1952/5/12, Berlin Wall 1st Anniversary, Freedom Bell Rings 1962/8/16, X-15 Space Record; Thor Rocket Launches Echo Balloon 1962/7/19