Ugh, as a driver I'd prefer not to have all my actions recorded regardless of whether it's beneficial to me. This reeks of invasion of my privacy and possibly opens me up to prosecution if the camera were subpoenaed in a criminal proceeding for something unrelated to the car's function. Same reason I don't leave a GPS trail everywhere by choice.
It's highly likely that any autonomous car will have something very similar but with sensor data instead of video.
If I were making said cars, I would not sell them without that feature. Otherwise, if something ever happened to the car I would have no decent record of what my software was trying to do in the incident. You would have no way of fixing serious issues, or absolving yourself of fault.
I don't think your going to be outed by a 120 second buffer. Especially if it isn't written to disk until theres a crash. (Heck, two minutes is probably a shorter time than it takes to open the hood and spray the RAM with liquid nitrogen.)
Unless of course your being accused of a crime that was either caught on film two minutes ago or it involved a car crash.
EDIT: Or was caught on film two minutes prior and involved a car cash.
In the UK we have automatic number plate recognition and a nationwide network of CCTV. Some places can recognise a stolen car and dispatch police within 60 seconds. (Notably the City of Westminster and Heathrow airport.)
> I'd prefer not to have all my actions recorded
Fair enough, but it's too late for some countries.
I mean no offence (I fully recognize that the UK is a sovereign state with rules that largely satisfy it's own culture and people), but I feel that if we universalize this idea ("Fair enough, but it's too late for some countries.") the result will be nothing more than a race to the bottom.