29Dec2016 02:34:33 Z
The left sound channel is horizontal acceleration. The right: vertical. The video shows the vertical and horizontal axes correctly.
The video runs at 14 times real time speed.
This is a magnitude 5.5, 15km deep, earthquake, 35 km east of Seddon
It was recorded about 90km distant in Kapiti, New Zealand.
The S wave arrives about 11.5 seconds after the P wave.
90km / 11.5 seconds = 7.8km per second of PS difference.
Turn it up.