This looks like part of a festival to me. One of the things I love about Jazz festivals is that the city/state/province holding the festival will often allow musicians to play almost anywhere. Churches, cigar factories, basements, rooftops, mountains. I don’t understand French, but this looks like the French Alps to me and it’s absolutely gorgeous.
I first saw this musician at a Jazz festival and fell in love with his music. I have a problem with heights, but I’d manage it for a concert in the French Alps (I think) with hang gliders in the background.