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 Mod-1 Lec-2 Harmonic and Periodic Motions, Vibration Terminology, Lecture - 5 Harmonic Oscillator (Continued), Lec-31 Learning Mechanisms in RBF