You are watching water shaking out of backyard above ground pool, 0:51 to 1:25 of the video (0:34).
Earthquake Shaking Seen in Ridgecrest Home's Surveillance Videos
Filmed by Donnie Morrison, via KTLA 5 on YouTube. Intensity Lab does not own this footage. Request removal
Earthquake M7.1 Ridgecrest Earthquake Sequence, 2019-07-06
Event page and simulated animations
USGS event page
Other parts of this video: driveway with two vehicles and pedestrian (0:00 to 0:27)