In the interests of research this guy should really try exercising his "right to travel" with the traffic police officers in other parts of the world. There's nothing like staring down the barrel of a Smith & Wesson to give you an entirely new perspective on the subject.
(disclaimer - I haven't seen the video yet)
Having stared down the barell of an AK47 wielded by an over-zealous border guard who asked his commanding officer "what is a dipromat[sic]" closely followed by "why wont he get out of the car?"; I am quite confident when I say - police in the UK can be quite intimidating.
While police here tend to be extremely professional, they are also extremely well trained with the tools that they have. If you p*ss them off, they aren't scared of using their baton. Similarly, they are pretty good at using the cuffs as a lever to get you face first on the ground pleading for mercy.
In some countries, the police have guns... and are trained to use them... but they are also very aware that once they use them, there will be court case after court case to see if they used the right amount of force. In some countries, a lot of media coverage is also on the back of armed police's minds...
The chaps with AK47's in many of the countries I've been too haven never attacked (non-verbally) a person in their lives, and in one hillarious case, didn't know how to load/re-load their standard issue rifle. In one case, I was driving down a VERY bumpy road (think pot holes the size of cars, and about as deep) giving a yound, AK47 wielding border guard a lift. He used the tip of the barrel as a chin rest... when I enquired as to if what to tell the next checkpoint if I reached it with him having sprayed his brains all over my ceiling - he smiled and showed me the "safety lock" on his rifle... which he disabled and re-enabled, without ever moving his chin from the barrel of the loaded rifle.
Does this make them more dangerous? Probably... but don't think that police here aren't intimidating... they may not (all) have guns, but they have tools that they aren't scared of using...
M.