The dash cam lost power on impact. The videos are in 2 min increments. I assume it started to record the next segment when it lost power.
According to the dashcam the white car was doing 53k so our Uber driver wasn't speeding in a built up area (60k ) the black car appeared to be going very quickly as it came into view and what might have saved all the people is the black car was starting to spinout just before impact BUT was it doing over 100k ???
an increase or addition, especially one of a series on a fixed scale
a skidding spin by a vehicle out of control.