The video showed that the owner of the first car didn't give way to the one doing the video and he deliberately didn't give way by doing the "F" sign with his finger. As he was going about his way he bumped the Jeep in front of him giving the video owner a delight for the supposed justice that he received. When these things happen somebody utters the word "Karma" or "Instant Karma."
Karma for me is not real because if it was there are many countless people who deserves justice didn't get them after their death sometimes. But there are a few instances that an event for someone might be a instant karma because someone saw the person got it apparently like this person in the video.
But as a person in Christian faith I am longing for the justice from God and it will not be done in this world but when God finally judged along with the saints all the people in the world from time immemorial up to the thousand year reign of Christ when the final judgement happens. It is the best thing that will happen because after that people will be saved not only Christians but some of the people who even didn't knew Christ.