Hello Heather, thanks for the question.
I can see why this is bothering you. You feel like you have had your character impugned, your privacy invaded, that you've been falsely accused of a crime, and you don't know how to react.
You're not being charged, so that's good. There was nothing wrong with going to the police to ask about any charges. You aren't going to be charged.
The police have more important things to do than go after a one off litterer anyway. Even if the other driver had brought the video to the police, and the police had been capable of identifying you through your vehicle, you wouldn't likely be charged with anything.
The only concern you should have is if the video is posted online and if it identifies you and calls you a litterer. I doubt that would happen. But if it did you should see a lawyer.
The best advice is to look at what you did which led to this. You had cargo unsecured in the back, tail gate not properly shut, and you let your phone distract and upset you too. Obviously, next time take more care and don't let your attention be yanked away by your phone.
Is there anything else about this you'd like to discuss? Did this help in any way?