The study makes no claims about why 432Hz is better, it just reports what they measured. I listened to the examples in the video myself and the 432Hz version really did feel about 1.0185 times as relaxing.
>> "I listened to the examples in the video myself and the 432Hz version really did feel about 1.0185 times as relaxing."
I tried to reproduce your result but I came out with 1.0815 times as relaxing. Are you sure you didn't commit a transcription error -- I doubled-checked mine.
Also: I had the BASS BOOST turned on my $9 bookshelf speakers while I listened. Did you have BASS BOOST on or off?
It should have just mentioned that Hz includes the arbitrary definition of 1 second. If we wanted real/natural values, everything should be done in Planck units.