Pretty sure you've heard "there's a time and place for everything"....and no matter what culture, it's a disgusting thing to say while eating.
Inasmuch as farting at the dinner table...if the family were just sitting around and shooting the bull, I can see someone saying such things as this and get a big laugh out of it, as I probably would say ''ewwww"...and laugh also. So in this video, the man was eating at the time, if he wasn't, then no big deal. I'm sure if we went out to eat, and I excused myself to the bathroom and came back and told you "all about it"....just don't believe you would like that, and vise-versa...it would be gross.