I'd share fault 75% to the silver car, 25% to the car with the camera.
The silver car is still facing straight when the camera car is building speed - so should be visible in silver car mirrors.
Silver car goes right in for the apex, leaving no room at all for any error from other drivers.
Silver cuts in so hard, you could see how the camera car driver would assume that with the difference in speed silver is allowing the faster car to pass, then at the point of no return leaves no room.
Camera car driver didn't factor in other drivers, 'style'?
So, make that 80% silver, 20% camera car.
What have other forums thought?