[dzhiurgis]

You can make secure dashcams that add some hashsum/crypto signatures based on all GPS signals received at moment.

That's quite general problem around deepfakes - how to generate video that's guaranteed real. Some form of DRM or blackchain is probably needed, not to anyones liking.

[kube-system]

Guaranteeing that the video is genuine still doesn’t solve the problem that [person] != [car] != [license plate]

[afiori]

In my country [person] != [car] is one of the exceptions on innocent proven guilty. You are responsible for who as access to your car and it is on you to reasonably prove that it was not you driving.

Typically happens with family members.