I watched the whole thing and I have to agree - the guy's not interested in working or playing well with others. If there's one way I know of to get someone to pay little or no attention to what you're about to say, it's to tell them that no matter what they think they know or understand, they're wrong. Another is to assert that you're right and there's no discussion possible. I almost didn't watch it after the first several minutes of him telling me how stupid I am, but I'm not so stupid as to think I know everything so I made the investment.
I agree with everything he said as far as it goes, and of course what little math he used works. Simple addition hasn't changed since... well, ever, and I didn't see him use anything else. So, anyway, how could you not agree? He's talking about physics, not suggestions or beliefs. These are behavioral laws that have been in place since at least the Big Bang. But, it would seem he's living in an ideal environment where there are no such thing as losses.
Mean ol' Mr. Mechanicalloss eats his lunch in the real world. Wave reflections are not only not 100%, sometimes they're only a small fraction of the original. If that were not true, we'd have discovered perpetual motion and its ultra-sexy twin sister, infinite sustain, long ago. However, some amplitude of the wave gets absorbed at the reflection point, and in the case of electric guitars may be considered lost. Also, energy absorption occurs more or less so depending on frequency and how absorbent the mounting point is to any particular frequencies.
Knowing all that, it's easy to imagine how a string vibrating at some fundamental frequency plus some number of higher frequency harmonics could, depending on how it's mounted and what it's mounted to (among other variables), reflect some or all of those frequencies at different amplitudes.
That's what changes how things sound.
It's interesting to note that he does an experiment at the very end where he uses the same exact same tuners, nut, scale length, bridge, pickup, strings, tuning, etc. on three identically cut but
different species of wood, and records the output of each for us to hear and judge for ourself. Those who believe the wood a guitar is made of makes a difference in how it sounds will be quite disappointed in the results, which reveal that the wood species has no audible effect on the sound! He is vindicated! Woe is us!
Uh huh. And bees can't fly. Scientists have proven it! Too bad both of those "facts" fly in the face of every human with functioning senses of sight and sound. Fortunately for the non-impaired among us, their experiments were flawed, which says we're not candidates for the nuthatch. At least, not for those reasons...
I'm not gonna get into the bee flight thing (see "
How Bees Fly" if it's buggin' you), but at least with the wood experiment, we have at least one obvious and major flaw: they were single pieces of wood with substantially more mass in the neck area than you'd see in any stringed instrument other than perhaps a piano or a pedal steel. (Actually, some would argue that a piano is a percussion instrument, but that's another discussion.) In any event, there was so much inertia in the mountings of the strings that the strings couldn't transfer much energy into them. So little, in fact, that you couldn't hear it.
Not that there weren't losses. There had to be or the strings would have continued to vibrate forever and ever, amen. But, since only variable that changed was the wood species, we're just going to ignore those.
Which brings us to where some of us have been for years - body wood species on an
electric guitar has little effect on its sound. Too much inertia involved due to its mass for it to do any energy absorbing. The neck, on the other hand, is long and thin. Relatively easy to move it around, which the strings do, by varying amounts depending on the wood species. Different woods are more or less elastic/brittle/dense, so they can absorb different frequencies by different amounts. Changes the tone of the instrument. But, even that is subtle compared to what the pickups can do to/for you. So, those are the biggies. After that we have the strings, nut, bridge, scale length, etc. but neck wood and pickups. That's where it's at.
That's my story, and I'm stickin' to it.