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 Howard Huges H-4 "Spruce Goose" Cockpit, Galileo, The Best Atomic Clock in Space, Howard Huges H-4 "Spruce Goose" Cockpit (Stabilized)