Violin Makers (2013). Full documentary - ENG. 

Someone left you these instruments?

Fat lady stuck in the bathroom?

I doubt two posts would be useful and its positioning appears to be largely convenience because it has to be inserted and positioned from the outside. I'm sure other ways have been tried but the effects virtually undetectable. Placement appears to be case of taste, but it also appears to act as a support under the high pressure area under the bridge. There will be a sweet spot and although I've read about it being too tightly or too loosely wedged, being overly tight likely interferes with the front plate's acoustics. Two posts or a larger wider post would likely take away from the instrument and its required tone.

Mechanical symetry is not the goal. Areas of strength and mass move weaker areas, the grain of the wood acting as a lever. Imbalance causes more vibration making the wood "breath" more than if everything inside was balanced out.

Because on the other side there is the bass bar that makes the whole top and back vibrate as one. You don't need 2 sound posts, one is enough to convey the sound to the back. Placement is not "case of taste", it's very precisely near the foot of the bridge near the E string.

Because the second would interfere with the first.

I know that I have one :-) and an Amati :-))

Australia remains primitive and will need another 500 years to make any impression on the world

trovato! e Europa Galante e Fabio Biondi e Roberta Invernizzi, Antonio Vivaldi's aria 'Amato ben'. Eugene Ysaye Sonata 4, op 27 'A Fritz Keisler',

So just use an ad blocker like Ublock Origin in your browser... in a video that long no wonder you had so many ads... It's in no way the fault of the channel or video maker.

@Syd McCreath I don't have an iPhone, on Android I have Firefox installed with the same extension, ublock origin, and if I want to watch videos undisturbed i'll just do that from the browser instead of the app.

Worse? 😂

Or car salesmen, or laywers, or consultants, etc,etc. Or does everyone you meet wear T shirts and jeans? Stupid comment you made, for the sake of making a comment!