The grid as you have posted about is vulnerable. Those massive towers carrying power to substations aren't replaceable overnight. No power to substations no power to homes & businesses.
Perhaps you should start posting some comments about your links so 1) we know where you stand and 2) we don't have to watch the entire video to get the gist of it. You've made it clear that you don't care whether anyone reads about it but you've given us nothing to read.I just post information from various sources and don't lose sleep about anyone reading or not reading anything about transmission power lines.
I was going to post unaffected equipment in structures taken off the national grid would be all military and mission critical structures connected by EMP resistant underground cables, the cross continent undersea cables and major hospitals and allied medical facilities with massive EMP resistant reinforced underground rooms containing massive amounts of life sustaining medical equipment including oxygen and regular air. These underground bunkers also have the capability to have surgery performed in them. Good day.
www.thompsonpowersystems.com/resources/blog/requirements-of-hospital-generators/
www.appliedpowerengineering.com/blog/hospital-backup-generator-requirements