I think you are making a weak argument that creating concrete audio/video recordings has any similarity to the memory of one's mind. There is such a massive ocean of difference between the filters of perception and distortion in memory recollection and video recordings, I think you are making the brain out to be something it isn't.
Nonetheless, this is an interesting debate. Reminds me of an episode of Black Mirror. Check that out for sure, it basically illustrates what you are saying. I found the segment in which before boarding an airplane passengers were required to allow the security to review their memory quite disturbing. Extrapolate that invasion of privacy in every other direction. Having whatever cloud or personal drive you record to be potentially hackable or open for evidence in the courts... It's just some dystopian death of privacy territory that I can't ever seeing the public embracing. Then again, maybe they will and if they do I'll be moving myself to whatever state our country is willing to stand up for privacy and ban such devices.
The basis of my position is the historical record that the most important ideas and movements towards advancements in human rights have often started out as illegal, unpopular and challenges to the status quo. The idea that we can stop crime by recording everything is an illusion and will only serve to suppress advancements which defy the current rule of law.