13Jul2015 20:57:45 Z
The left sound channel is horizontal acceleration. The right: vertical. The video shows the vertical and horizontal axes correctly.
The video runs at 15 times real time speed.
This is a magnitude 4.1, 31km deep, earthquake, 15 km north-west of Eketahuna
It was recorded about 62.4km distant in Kapiti, New Zealand.
The S wave arrives about 9.5 seconds after the P wave.
62.4km / 9.5 seconds = 6.6km per second of PS difference.
Turn it up.