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 Mátra: Kékestető, Galyatető biciklitúra / Bicycle tour / Fahrradtour, Mátrabérc trail 2015' : 54 km + 2800 m szint - terepfutóverseny