I could not watch the video but I guess he is showing the shotgun carried by holding the barrels and broken. If he is also saying that it is unsafe to carry it broken and empty over your shoulder by the stock then he is simply wrong.
I don’t care if he is with the National Shooting Sports Foundation.
Carrying a double or OU broken, by the stock with no shells in the barrel is as safe as it can be carried. There is zero chance of an accidental discharge.
I am a certified hunter safety instructor and a certified firearms instructor. Certified by the State of Mississippi and the NRA.
I taught skeet shooting at the University of Southern Mississippi. I am a fanatic on gun safety but there is a difference between being fanatical and being ridiculous.