Is there such a thing as a piano that goes from high notes to low notes where the left hand plays the melody and right hand plays the harmony? Lol what is going on here:
Bah, this video has been filmed in a mirror: The pianist is sitting at the left side in front of a piano!
Best guess would be it was shot using the selfie-cam on a smartphone.
They are often mirrored.
There was a very rich left-handed player, who had a grand made for him (one off, no surprise there!) I mentioned it in an answer a couple of years ago. Strangely enough, not many of his musical colleagues could play it well...
Could be referenced to a question about genuine ambidextrous instruments I asked.
It would be easy to map an electronic keyboard to play 'backwards'. But this is just a reversed video.
Here's a whole band of reversed marimbas. Watch the bass player at 1'14"