I watched the video for a second time looking for the key concepts Haidt uses. As I mentioned previously, Haidt studies human emotions. His research verifies that our emotions have two ways of relating to the world. One way relates self-to-world and the other way relates world-to-self. (I thank the philosopher John Searle for the core concept of direction of fit.) It would make sense if evolution matched real world demands. There are times, such as war, when cooperation is essential to survival.
The claim that Haidt makes is simple, yet complex. We need both competion and cooperation to survive. There must then be emotions promoting both. The emotions underlying cooperation are called "collective emotions".
Perhaps the best of this video comes where Haidt says that self-transcendance is recognition of "the sacredness of all around us". This is direct agreement with Albert Schweitzer, A. N. Whitehead, William James (cited by Haidt), and many others. Haidt is very well read.