I am going to say with A VERY HIGH LEVEL OF CERTAINTY that because of the bird noise sound level....THE VIDEO WAS SHOT IN OPEN AIR, OUTSIDE ON THE BALCONY.

As for putting this to bed once and for all though....someone could find out what building it was shot from and confirm that they are OPEN AIR balconies in the building.
That will end ALL debate on that subject.

Shouldn't be too hard for some GLP sleuth.