If that video changes your mind about anything, you're probably a tool with little in the way of real conviction.
First of all, he should have had the pork shoulder in front of the rack of ribs. Most people don't wear clothes directly over their ribs. I don't have much in the way of a bench press cause I have a girly-man chest but I still probably have a good 2 to 3 inches of muscle and tissue in the form of pectoral muscles between my clothes and my rib cage.
Secondly, as I've said many times before, 1/3 of Americans are obese and just under 1/2 of us are overweight. At 6'6" and 190 pounds, I don't fall in this category, but chances are good if you have to drop the hammer in anger, they're going to be a bit thicker than me.
Additionally, look at the target he shoots to demonstrate the spread of the shot. Notice how the target's arms and hands obscure his torso?
So, have him repeat this test with two pork arms out in front of the pork shoulder, with the ribs behind the pork shoulder so that the birdshot has to penetrate the forearms/wrist bones of a 250 pound critter, denim, 3 or 4 inches of meat, then the ribs. That is far more realistic than the test he performed.
There is a reason those in the know insist on having adequate penetration before worrying about over penetration. Adequate penetration doesn't just mean for ideal shot presentation on ideal targets. We aren't preparing for an ideal situation here. If the situation was ideal, we wouldn't have to shoot somebody. I plan for a less than ideal situation by requiring anything I am to trust my life to demonstrate that it can reliably penetrate to and through the vital organs of a large man-sized critter regardless of shot presentation. The FBI likewise requires a minimum of 12 inches of penetration through tissue, even after penetrating sheet metal or windshield glass. Turns out they learned some lessons the hard way, and those are the lessons that usually stick with you.
I've seen birdshot from a 26 inch barreled XFull turkey choked Rem 870 fail to penetrate the chest cavity of a rabbit on a regular basis at ranges I have inside my house--say the 50 feet from my kitchen to my living room. No hillbilly shooting pork shoulders is ever going to change personal experiences. And my personal experiences tell me that birdshot is for the birds.