What percentage of drivers actually put their phone down when they start moving, would you say? Anybody will slowly normalize the behavior. It's just stopped traffic. It's a traffic jam, we're only moving 5mph. I'll put the phone down if we actually get going, etc.

It's illegal in most US states as well, though it appears to be rarely enforced. The worst outcome of being distracted while stopped is simply holding up traffic, so perhaps police feel it's petty to enforce it.

That's the thing - even if it is illegal, it isn't hurting anyone, and no doubt cops do it as well. He may as well go around filming people jaywalking on empty streets for all the good it's doing.