The motorist in the video committed a crime -- several actually. But the cyclist committed an indiscretion by chasing down the motorist to give him a piece of his mind. That's not illegal, it's just a very bad idea.
Many years ago I heard an interviewer ask the great race driver Jackie Stewart what it takes to be a great driver. He said that a driver ought to be emotionless. I think this is very true for any kind of driving -- or cycling. Never prolong your reaction to anything that anyone does on the road beyond the split second it takes to deal with it. Let your attention move on to the next thing. Never direct it to a driver because of something he *did*. Keep focused on what's happening now.