The production appears to be classical, but includes Cherniakov's usual obsessions with prostitutes and bathhouses in later scenes (staged in a C21st setting) which don't appear in the clip below.
I think the whole country is obsessed. This brings such a far remove fairytale easier to sell. Many of the new stage renovations are trying to attract young audience or something.
They are in the period costumes so to say (and are not moved into our time), but there is piano there on stage that is a little strange perhaps. Also there is harp there as well as Russian folk instrument gusli that bards of the past used to accompany themselves .Maybe this is not very authentic.