Yeah, I understand. And I agree that wrong-way riding is more dangerous than running red lights, in that a pedestrian can step out between any pair of parked cars and be suddenly in the rider's path.
It's astonishing to think that wrong-way riding is often done out of ignorance; but, from your experience, this is evidently the case. So some informational materials are called for.
Still, if/when you make your video, I hope that you will mention the public-relations angle as well as the safety issue.