all claimed videos above are fake, no real person stays near those facilities... tomorrow we'll likely know about the scale of the damage from satellite view photos...
In the mean time iranian approach is for internal consumers: usual "everything is under control" approach to not create panic among the population... here's how they likely minimize the reputation blow:
As a result of the US attack, three nuclear facilities did not suffer irreparable damage (c) Mehdi Mohammadi, adviser to the chairman of the Iranian parliament:
In fact, the Iranians claim that they took out the most valuable things long ago, and the facilities did not suffer critical damage.
Iranian media also report that the attacks were carried out on the exits from the facility in Fordow. Of course, this can only collapse part of the exits to the surface, but it is impossible to destroy the facility itself. The exits themselves are quite repairable.