Electrek has a longer video in their article: https://electrek.co/2018/06/16/tesla-model-s-battery-fire-in...
The fire looks like some high pressure gas burning to me, with the flames violently exiting to the left. If you watch the longer video, this is mostly over by the time the firefighters arrive.
This could point to the fire being not in the battery, but the AC unit, which is in the front of the vehicle. Modern AC units contain flammable chemicals and when operating would be pressurized.
This could point to the fire being not in the battery, but the AC unit, which is in the front of the vehicle. Modern AC units contain flammable chemicals and when operating would be pressurized.