Pidgeon, I watched that video and it concurs with a similar finding that personality traits can similarly predict political leanings. What I don’t like is that the American interpretation of the terms ‘liberal’ and ‘conservative’ are used and conflated with a political affiliation. I don’t think that is as applicable in a European/UK (possibly anywhere outside of USA) context.
In USA any idea of “free at the point of service” health care is seen as reds-under-the-bed communism by the conservative group yet in the UK, for instance, the NHS would have broad support from almost everyone regardless of how they vote. Public transport investment would similarly have broad support in the UK and Europe but not so much in USA.
I believe we have to find an alternative to the left/right politics and realise that in some instances it is more benificial to be conservative in its truest sense and in others it is better to take a socialistic stance. We must all be open to new data or refined data on any subject. One’s views must be open to being updated and adjusted accordingly.
I don’t know if you know of Jordan Peterson, a Canadian clinical psychologist and professor, who came to light for his opposition to gender language laws in Canada. He has a series of lectures on Personality and Its Transformations which although lengthy might interest you.