clawsonk wrote:

Hmmm, I wonder if I see future opportunity here as a piano de-tuner?.....Is you piano in tune.....don't waste another moment.....give us a call today and we'll have you de-tuned in no time....We 100 percent guarantee there will be no harmonic relationships after our de-tuning!

We already have that.
It's called 'worn condition'.

My comment was sarcasm/joke.

EDIT/UPDATE:  LOL Viridis - when I made my initial comment, I was thinking about real pianos.  I was playing on Pianoteq while ago and while glancing at the monitor while playing I was stirring at the "worn" slider.  I had not even correlated your statement to Pianoteq and this slider.  Now I get what you meant.  My mind was still in "real" piano.  Apologies.      Yep, we do already have that virtual world piano tuner.  I can be so dense sometimes, and I don't even have to try.

Hmmm, I wonder if I see future opportunity here as a piano de-tuner?.....Is you piano in tune.....don't waste another moment.....give us a call today and we'll have you de-tuned in no time....We 100 percent guarantee there will be no harmonic relationships after our de-tuning!

We already have that.
It's called 'worn condition'.

Apart from what the guy in the YT video is arguing, my experience with A 432 Hz is following:
At a party where I was, a pianist who was setting up his piano was asked about this alternative tuning. And because I had never heard a piece in 432 Hz, he decided to show me the difference between 440 Hz and 432 Hz.
First he played in 440 Hz. It sounded nice. As I was used from well composed and played piano pieces.
Then he retuned his piano and played the same piece in 432 Hz. What I noticed (to my suprise) was that while the sounds of the 440 tuning came into my being 'through my head', the 432 Hz tuning came 'through my heart' (I really felt my heart area). Also, I noticed that I felt as if I had tears. Some emotional effect.

I often play in 432 Hz and I like that it sounds emotionally nearer, so to speak.
But I think, everybody has to decide for themself. But only detune A from 440 to 432 Hz. That's how it works.

Even in other galaxies they knew that :

https://www.youtube.com/watch?v=sHD-knhS6es