That shit is scary. My son is 13 and has been lifting off and on for the last year. He has recently started lifting with me and my partner.
He shows no signs of this problem being discussed. But I think I will talk to him anyway.
That particular family on the video seems pretty normal. Of course you never know when watching TV.
As far as forcing kids to eat. I haven't had a lot of luck making them eat stuff they don't want to eat. It kind of works if your are forcing them to eat their peas once in a while. But all day every day won't work.
I actually knew a guy in the Navy that would only eat french fries, popcorn, and pancakes. I am not kidding that was all this guy would eat. We used to tease him and tell him he had the body of an 80 year old. He had a big belly, skinny arms and legs, cellulite all over and greasy hair and skin. He had wealthy parents and was a cool and funny guy. He said his parents tried forcing him to eat (didn't work) and sent him to doctors.
I was so worried about him (he reported to me) that I decided to tell the ships doctor to check him out. The doctor found he had scurvy among other things. So the guy started eating limes and oranges at least. That kept his teeth from falling out.
The guy never really liked me after that, and I did feel bad about it afterwards. I felt like I sold out a buddy. The doctor told him he would be dead before he was 30. The guy said that is what the doctors told his parents too. His parents were hoping the Navy would straighten him out.
Anyway the point I am trying to make is that this stuff is not so easy to fix.