Specifically, the people I know who fall into this category have one or more problems:
1. One (big) problem is that they often have an enabler -- that is, someone who is supporting these folks not working in some way. The fact that they don't do more chores or childcare supports this hypothesis. As the video said, sometimes it's the wife, sometimes it's the government via disability, sometimes it's family.
2. Another problem is issues with authority -- some of these folks are difficult or impossible to manage. Of course, sometimes it's because the company/manager is dysfunctional. Other times, the "issue" is that an employer sets healthy boundaries, and someone who does not have healthy boundaries will struggle to work within such an environment.
3. A third problem is simply drug use. There are a not small number of jobs that can be done by people with low education and low skills, but the employee must be drug-free or must be a "functional" drug user. There is definitely a chicken-egg question about drug use, but once drug use begins, getting and keeping a job becomes much more difficult.
In the video, they say education is one of the keys to help the situation, and I am not convinced that this is true with the current state of education in the US. The education that needs to be done is more social/psychological in nature, imho. Until this happens, these dysfunctional people will continue to be dysfunctional. I don't want to pretend like this type of education is easy, but I think that it's closer to the solution.