You do not always know when you are a potential suspect of a crime, or that you will not be in the future. Nor do the police need to actually suspect you of a

You do not always know when you are a potential suspect of a crime, or that you will not be in the future. Nor do the police need to actually suspect you of a crime to harass you. If the police come to you and say "we suspect a crime has occurred in your neighborhood, can we have your video?", you don't know whether you are the suspect in that crime, or if the crime even occurred. If someone has stolen something off your porch and you have identifying evidence, get the video yourself, and select the portion that identifies the thief. Give them a still photograph of the thief's face and/or their vehicle. Giving them a lengthy video that captures your own activities is "talking to the police" in the bad sense.