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 Echo camp 2010 - Христианский молодежный съезд, Хор колокольчиков - Bells choir (Gvozdov), Средь суеты и забот - Echo camp 2013