What gets people upset is the suspicion that suspension with pay means back on duty once the fuss has died down, even if the officer in question had screwed up.

I think that improving the video technology significantly, so that there would be hard evidence of what happened in any confrontation is there. Too often we hear that the camera wasn't pointing in the right direction, or the equipment went wrong, or had been turned off. Those things should never happen. And rather than objecting to observers making a record with their phones, or trying to stop the recording, that should be welcomed and encouraged.

As has been pointed out, being recorded encourages all of us to be more careful about behaving badly. It protects police against false accusations, and also protects them against themselves sometimes.