The fatal flaw in the video (though he makes a lot of sense) is the assumption that people will drive sensibly. We all know that doesn't happen all the time. I am of the mind that laws are for people who do not do what they ought to do by themselves, those who cannot/will not self govern.
For most of us, local, state, and Federal government spends very little in policing our behavior. We police ourselves. We do what we're supposed to do with consideration for others (most of the time). If it were up to us, we could all go back to the days when we could leave our doors unlocked and our keys in the ignition, because we wouldn't be getting into our neighbor's things, and they wouldn't be getting into ours.
Unfortunately, more and more people for whatever reason seem to lack the sense, respect for others, common decency, etc to govern themselves and do what they ought. That's why government (that we pay for) has to expend so much effort to make and enforce laws.
There's a verse in Proverbs, I think it's in chapter 18, but paraphrased it says, "For the transgressions of a people, many are the princes thereof." In other words, because people won't do what's right, government expands. And there you have it.