Pumpkin the robot
Guru
The idea is not to prosecute all offenders. It is to educate them about the manner of their driving.
If you send a decent clip in and they think someone needs to be made aware of their manner of driving. Then that is up to the police to do that.
If the police then have to inform all the people who have sent clips in of the outcome. That is doubling their work load.
So report it and leave it. The outcome really means nothing to you. You have done your bit.
But there are instances of people submitting footage that for various reasons could not be used, despite the police wanting to do something about it.
You would want to be informed of these reasons so it did not happen again.