I don't disagree that this (the recent availability of online lectures) is not a mirror replacement for uni. It's also not entirely new. The possibility of getting a uni equivalent education without enrolling has always existed (at least partially). Books, uni Libraries. Many places will let you sit in on virtually all classes without enrolling. But it has always remained in the sidelines.

But... Pointing to any developed of this kind and saying 'this isn't uni' as if it means something really substantial is short sighted. The improvement & accessibility of free online learning materials is going to have a profound effect, most probably.

If Universities' value is kept only in the fringe: 'interacting with others,' 'the personal & social experience' & the rest of the things that cannot be replaced by online study, well... Universities have an educational (skills & knowledge, if you prefer) role and a gate-keeping role. If they loose their edge on those, they loose their edge.