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 Halo 3 Splatter Montage 5 to In the Hall of the Mountain King, Halo Music Video Montage 1 - HD, Halo 3 Splatter Montage to 1812 Overture