The camera car is traveling 74 kph at the very beginning when the white truck is trying to pass, but quickly speeds up to 85 kph to prevent the pass. It then slows gradually to 80 kph, seems more like letting off the gas rather than a brake check. The first oncoming vehicle doesn't appear until 14 seconds in, so the pass might have been a bit close, but probably ok if the camera car hadn't sped up. Actions on both sides seem to be intentionally antagonistic.
KuoH