Just to play devil's advocate...that is a nice vid taken from the interior of a truck with good sound deadening and the windows rolled up. My 2015 GMC is silent in the same situation.
The Elco vid I think shows the true sound, at idle, from the exterior, with full tail-pipes. It's f-in loud. That's great if you want f-in loud. As much as I like loud, please don't piss on my back and tell me it's raining. At those sound levels I think you could save time and money and skip the mufflers altogether.
Just my opinion of course. Exhaust is probably the second most subjective thing about vehicles, right behind paint color. Sound quality, and decibel level are all personal preference. I'd never run anything half as loud as that, mostly because I get up for work between 12:30 am and 4 am...my neighbors (and my own family) would lynch me.
On a street/strip car...maybe.