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 Educomp Smartclass Content Sampler: Class XII Mathematics Determinants by Educomp, Educomp Smartclass Content Sampler: Class IX, Political Science, Judiciary By Educomp, Educomp Smartclass Content Sampler: Class VI History, Buddhism from Educomp