As Dave Hester would say..."Yuuup!".
I watched this video, the fella is blessed with common sense. I only see two obvious problem areas and they are probably shared by most -
1) People in your family, immediate and extended, may not be the most reliable and dependable...and like he correctly stated everyone has to pull their own weight. If not, they're gone. But then what if they don't willingly leave, what if others you prefer to stay interfere, etc etc? Somebody is going to have to be the bad ass, The Enforcer, and live with the fallout. Chances are you'll have dependable allies to make hard decisions easier...but some will be harder than others. Something to think on and best thing you can do is tell people ahead of time the ground rules and who is not welcome. An accompanying consideration is having plans, staging points, prepositioned emergency supplies, yadda yadda yadda.
2) Defending ones people and property. Gonna find out real quick who can cut it and who cannot, adjust roles and responsibilities according to ability. If your young niece is more reliable on-the-line than a brother or cousin, make the switch. When it comes time to do what must be done hesitation and doubt will doom you all.
It's usually these "not nice" topics that many family members squirm over and wish to avoid. Force the topic. I will be doing just that this Thanksgiving...it may be one of the last peaceful gatherings we have...it is the time for peaceful separation from our enemies or violent separation...there is no middle ground, unless you call mass graves the middle ground. I reckon my introductory address will be received about as favorably as a ripe toot, but for some people reality has to be shoved in their face. They can run away...but the knowledge will still be in their memory.