21May2015 14:15:32 Z
The left sound channel is horizontal acceleration. The right: vertical. The video shows the vertical and horizontal axes correctly.
The video runs at 10 times real time speed.
This is a magnitude 3.6, 26km deep, earthquake, 23 km east of Paraparaumu
It was recorded about 17.5km distant in Kapiti, New Zealand.
The S wave arrives about 4.37 seconds after the P wave.
17.5km / 4.37 seconds = 4.0km per second of PS difference.
Turn it up.