Haha, all those videos are golden to me - you can watch any single one of them and learn something.
I feel the same about VR, like all technology before it - it has awesome potential to create and destroy.
I've wondered about the brain a jar thing myself, but often think of the holographic universe - https://en.wikipedia.org/wiki/Holographic_principle
thanks drugs.
We'll have to see - personally I'd want color changing eye contacts that can turn any room into an instant rave - but that's just me.