I would expect that Roadsafe might well choose to prosecute that. They are all or nearly all traffic officers, usually with motorcycle experience.
I just love Roadsafe - really professional unit, and they are so easy to report to online. Going down to a police station can sometimes be a very time consuming process.
Who are roadsafe? I tried to google them and came up with this
link . This is not a group who would seem to prosecute offences as it is a campaign group. I presume there is anothe group you are referring to. Do you have a link to them?
Re OP - was poor driving to say the least. Sadly, even if this were prosecuted, the driver would get a small fine and points. Also, I'd bet in most cases, the prosecution would not play the clip to the court at a sentencing hearing - relying instead on a verbal description of the incident. Quite why the prosecutors don't use footage more often is beyond me. The old adage that a picture paints a 1000 words is so true.
Nice camera set up. What is it and how do you show both views on same clip?