Fascinating stuff. I now know more ...but have the same perspective .
Leaves me wondering, though, why higher-end phono pre-amps don't come with the same facilities of independent R and L gain. And a mono switch. I think some have the ability to vary the Eq curve? The equipment in that video looks like pretty basic ideas.
Many hi-end ones comes with all the trappings... there is EMT, but their phono costs about $20k+++, then there is a brit manufacturer who sells his phono for about $12k (this one has about 200 odd eq curves I think... Then Nagra has one too at about $40k....
I have the cheapest one at $4k - Monk Audio... Has a knob that lets me choose between stereo, mono (vertical cut), Mono (horizontal cut), Mono (L) and Mono (R)... it also has 5 selectable eq curves that take care of almost all popular eq's...
It also has inputs for 3 diff tonearms! and a whole lot of diff settings that'll take care of ANY kind of MM in the market... and has built in SUT's for the MC...
So, actually, there are a fair amount of well thought out products for a Vinyl head... and at all price points!