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 BCC 9 - Sizzle Reel for Avid Media Composer, BCC 9 - Sizzle Reel for After Effects, RED 5.5 Sizzle Reel