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 004XC Kat Lessing FEI CIC1* Cross Country at Woodside International Horse Trials October 2011, 144XC Samantha O'Meara Preliminary Cross Country at Coconino Horse Trials week 2 July 2011