The Tesla's driver had posted at least one accident avoidance video before, so I suspect that there's likely a full video of the accident. A police beat article at the time of the collision said 'charges were pending', so honestly, all of this really reads like smoke to cover the trucker and the company.
It does certainly point out that the system is not invulnerable. But considering the wide variety of similar incidents across the US highway system of this exact type of accident, I'm not sure if it was preventable when a trucker negligently crosses on coming traffic. Like all newer vehicles, the Tesla's daytime running lights are always on.
Shame the driver apparently had incredible hearing to hear and identify a Harry Potter movie as the car crashed under and continued on after the top of the car was sheered off, yet didn't have average vision to see the oncoming car.
I suspect this was after the car came to a complete stop and he went over to check on the driver..