I have voted no.
1.  We don't have a cat in hell's chance of seeing a prosecution go through on the basis of a video like that.  Let's assume the video in the OP got to court - the driver and/or solicitor would make mincemeat of it.  That doesn't mean it's impossible - but it is ......... vanishingly unlikely!
Drivers like that have grown well used to the situation, don't give a monkeys, and take every advantage.   Some from complacency, some for malicious devilment.
2.  Police DO have a "light-weight" option however.  Which could be used, and should be used?  
http://www.legislation.gov.uk/ukpga/2002/30/section/59  -
	
	
		
		
			59    Vehicles used in manner causing alarm, distress or annoyance
     (1)Where a constable in uniform has reasonable grounds for believing that a motor vehicle is being used on any occasion in a manner which—
               (a)contravenes section 3 or 34 of the Road Traffic Act 1988 (c. 52) (careless and inconsiderate driving and prohibition of off-road driving), and
               (b)is causing, or is likely to cause, alarm, distress or annoyance to members of the public,
		
		
	 
The power to seize the vehicle - as long as a warning has been issued.
No faffing around with measuring tapes and calibration.  All the PC has to do is put his/her cap on when s/he watches the video clip - and pass the job of recording the incident and issuing the formal warning letter; part of it to clerical staff .... or even some of the tasks could go to volunteers.
All it would take - a month's trial.  The local papers would hum.  The radio phone-ins would sizzle.  


