The video starts with the presenter explaining that he will be talking about harmonic oscillators, not the harmony of anything in sound, but something that moves back and forth in roughly the same speed back and forth.
He explains this with a metronome. Shifting the weight up and down to show the different speeds the metronome can move at.
He moves on to showing the conservation of energy with a bowling ball and string, working a true pendulum. To prove that the pendulum will not move back past its starting point. He drops the bowling ball, after resting it against his nose. The ball does not hit him when it swings back.
A snow motion is then shown of the bowling ball drop.
He goes on to show that the length of the length of the pendulum affects the speed of the pendulum.
Shorter pendulums swing quicker.
His final experiment shows that, using a pendulum, one can move a larger weight with a smaller one.
When he starts the pendulum, the larger weight starts to ‚Äújump‚Äù as the weight of the pendulum pulls the larger weight from the ground.