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 Let's Play Ocarina Of Time, Pt. 65: Poe Poenage, Mario Paint Orchestra: "The Wind Never Ceases", Let's Play Megaman 2 Part 6: Finished, Not Really