This is a new one. It apparently is a Romanian operetta or play, staged here with some nice classic style costumes by Musical Theatre "Nae Leonard" in Galati, Romania. The production is based on a book by Ion Luca Caragiale from 1879.
These photos are from:
http://www.cimec.ro/Muzica/Cronici/CostinPopa248.html
(with a review of the performance)
http://www.viata-libera.ro/ancheta/36604-premiera-galati-viata-libera-eveniment-premiera-muzical-succes-intamplari-intr-o-noapte-furtunoasa-foto
I had hoped to find a video of the cancan from this performance, but no luck.
There is this old video from 1943 that has a couple of cancanesque sequences in it at about 7:50 and 17:07:
https://www.youtube.com/watch?v=rfbBjK7Vnww
Another from 1984:
https://www.youtube.com/watch?v=vaCO_62_o-A
(Opening credits and at about 7:05)
