That road looks narrower than seven feet to me. And the first bollard on the left looks ever so slightly on the wonk.
My car is 6'6 wide and the width restrictors where I used to live in SW London could be a bit tense but I never hit one.
It must be something, that video shows cars of all sizes hitting the thing, from little Toyota Aygo things to SUVs to vans.
If the council is actually acting it must be a genuine problem!