You are watching interior of school gym, 0:00 to 0:10 of the video (0:10).
Ridgecrest earthquake video: Kids scream as 6.4 quake rattles stage in July 4th performance I ABC7
Via ABC7 on YouTube. Intensity Lab does not own this footage. Request removal
Earthquake M6.4 Ridgecrest Earthquake Sequence, 2019-07-04
Camera Burroughs High School Ridgecrest, CA (indoors, ground floor)
Compare with the simulation
Event page and simulated animations
USGS event page