The arguments I’ve seen basically ask for every second of video recorded to be posted online. The public should be able to FOIA request everything. With the amount of video they should be recording, (dash cams, body cams, fixed cameras), we would need to hire 2-3 media specialists to do the blurring for each and every cop we have in the field. With this in mind, the most accurate, direct answer to your question is “No, I don’t think they could blur anything.”
I think that when I am pulled over in public and forced to interact with a cop, the video record of that interaction should remain outside the view of the public, unless and until I am charged and convicted. I believe the cop, his supervisor, and everyone in the department should be prohibited from viewing that video without asking the courts for a warrant or subpoena.
The circumstances of this article demonstrate why.