The BIGGEST problem with clean energy

I just noticed this vlog was fine but very much reduced to an American point of view. Switzerland and Austria ( and probably Norway and Sweden) produce and store lots of energy through gravitation/dams on several level) , Germany and Italy produce lots of energy by means of PV and everybody sells energy to everybody. And there are a bunch of competitors to TESLA' s powerwall around here as well.
One more thing: Most of your examples pointed to technics that can only used by big companies. Another solution could be to go towards small installations. A farmer with his own PV and batteries can easily go off grid for several days and reduce the stress on the electrical network. The same result can be produced by improving isolation because you need less energy to cool or heat.