Observing the transcript the video seems to be focusing on the numbers and comes back to the 432 stuff. The problem with this kind of numerology is that it's based on the fairly arbitrary units we happen to use today. 1Hz is one cycle per second, but what is a second? Our notation and calculation of time is really a very sketchy system. Leap years, leap seconds, months of different lengths, etc - it's a mess, from a technical point of view. Anyhow, the quasi-duodecimal measurement of time in hours, minutes and seconds is not based on anything 'fundamental'.
I was recently informed that somehow the size of the great pyramid of Gizeh resulted in pi. Sounds great, but the builders didn't anticipate either the imperial foot or the metric meter.
Now, I'm not aware of the existence of a single study confirming that the King's Chamber inside the Great Pyramid has a resonant frequency of 432Hz, which is claimed in the video, but even if there were such evidence - there would have to be harmonics nearly as prevalent as the fundamental frequency, I'd expect.
I do, FWIW, concur that the pyramids were not designed or intended as graves, and it strikes me they clearly had a purpose besides just looking impressive. I've read various publications which offer some compelling suggestions, yet they're unable to answer some fundamental questions. Until now we're lacking a concise, coherent model of their purpose. Equally the construction remains somewhat problematic though various hypotheses seem possible.