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 Borderlands 2 Music - Slagged Bloodwing Battle, Borderlands 2 Music - Torgue Arena (Battle), Borderlands 2 - Song for Mordecai's Stupid Bird (In E-)