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 Nils Wogram "New Style" Jazz Trombone & Improvisation Clinic - Trailer 1, The Official 2009 International Trombone Festival Documentary Film (Trailer), Cindy - Trombone Quartet - Lullaby