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 It's a Mean, Mean Lifetime - TRAILER (Half Life Source Machinima), Half Life 1 Soundtrack: 8 - Sirens in the Distance (2), Half Life 1 Soundtrack: 14 - Steam in the Pipes