I don't like that video, but yes, I don't think that design is the solution for the future. Using water als gravitational storage is quite well developed and ha

I don't like that video, but yes, I don't think that design is the solution for the future. Using water als gravitational storage is quite well developed and has additional benefits (like storing precious water for droughts). But that is the nice thing going forward: there are many different ways of storing electricity and many of them will be tried. I am sure there will be a lot of new feasible ways of doing so in the market soon.