I noted a lot of mental illness in that video.
Yes, they seemed to be very unhappy, very alienated people, many young.
They are the people that are being left behind by the information age.
Fifty or sixty years ago, they could have gotten manufacturing jobs that would have been boring at first, but which would have led to better things later. Unfortunately, those jobs sometimes create bad smells or big factories that are un-pretty when viewed against the backdrop of the untouched countryside. The political leaders of those very protestors have decided that jobs like that should be done by people in other countries, and factories like that should be built elsewhere.
It's a riot of perverse incentives.