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 Sound Horizon - 美しきもの (Utsukushiki Mono), Sound Horizon - 蒼と白の境界線, Sound Horizon - 朝と夜の物語 X4!!