11Apr2016 19:41:06 Z
The left sound channel is horizontal acceleration. The right: vertical. The video shows the vertical and horizontal axes correctly.
The video runs at 18 times real time speed.
This is a magnitude 5.2, 24km deep, earthquake, 15 km west of Masterton
It was recorded about 37km distant in Kapiti, New Zealand.
The S wave arrives about 6.2 seconds after the P wave.
37km / 6.2 seconds = 6.0km per second of PS difference.
Turn it up.