My mind is blown honestly. Which part do you want to be elaborated? How to change it or about jurisdiction? I assume the latter.
Well, most americans are "US Citizens" which means legally you are subject to territorial laws, so when you go into a court they will adress you as a US Citizen or they will adress you with ALL CAPS name like "JOHN DOE" then you are subject to municipal laws. This is because you've been employed by these foreign companies since you were born. This also means you are not currently protected by the american constitution at all - in their courts.
The thing is they have "tricked" people because Florida, State of Florida and STATE OF FLORIDA are legally not the same entities and different rules and laws apply in different jurisdictions. Florida is the actual state, the land and soil, where laws of the land apply while State of Florida and STATE OF FLORIDA operate under international maritime laws basically the british crown and the pope. However you can change your legal documents so that you go from "US Citizen" (an employee in their company INC) to an american national, which puts you from the maritime laws to national jurisdiction. The constitution guarentees your rights in the national jurisdiction. So when they take you to their courts and adress you as a "US Citizen", you can say that you are not a US Citizen but an American national, which puts you out of their jurisdiction. There are some exceptions, where you can't do it. Currently in a lawsuit, federal employee, federal military employee, african american, federal dependant etc. But the average white dude can do it.

I'm still absorbing all of this myself. From the website in the OP, its much better explained than I can but yeah it takes some time to read and understand it all. This is a new topic for me, very interesting. Well, basically african americans CANT become american citizens, only federal citizens but they want to change that. The alt-right need to take control of this movement and stop that from happening. I don't know enough about everything else like what about other nonwhites? or which rules/laws would someone be subjected to as an american national under national jurisdiction but if the alt-right took control of this, we could shape those rules and laws.

We're generally pretty high IQ so i'm almost certain we can use our autistic skills to solve this. This is a legal way to take back the country. The US was basically a white ethnostate in 1860, so it's completely possible that only whites can actually do this, because everything has run on the federal and municipal level since 1860, the American national government is still waiting "reconstruction". I don't know enough to say that only whites can do this for certain, still learning. But currently I actually think this is the case. The founding fathers were very explicit about their desire for the USA to be a white ethnostate.