Realizing my Snark tuner is able to change the A hertz, I had to try this. I had never heard of this before. Had no idea there might be a better tuning reference. I like the sound! I now have two ukuleles and two guitars all tuned to A=432. Not sure if I’m healing my DNA like some evidently believe, as referenced in the video, but it sounds good to my ears. There are lots of other reasons someone might do this, especially on a tenor ukulele. It definitely lowers the tension a little bit and I don’t know that it would work without a somewhat higher tension string. I use Aquilla nylgut. It could definitely be useful for a beginner to play a 1st pos. Bb cleanly. String bend and vibrato is a bit easier also. I am curious if other people try A=432 and like the sound. It is very easy to do on the newer Snarks.
Ron