If this is the first time you've seen ol' Kelly on this subject, he's been fat for years. He regularly appears on C-SPAN's Washington Journal. (They have a free video library if you're interested.)
The agenda of this series is to legislate health, to cut to the chase. I'm all for it. But we obviously don't have the systems in place to do that efficiently so it won't happen. We don't elect people who will stand up to the companies that are killing us. We don't collectively stand up to these companies--they know it. The concept of the "common good" is just about dead here in the US and we don't much mind, or else this doc would not be necessary.
I watched most of three of the four episodes and I intend to watch it all in its entirety. What I did see was mostly flat with too many "experts." And I kept having to pause and reverse to catch the names. There was a CNBC doc on the same subject, with the emphasis on healthcare, IIRC that was only an hour including commercials. And in that one they made sure to profile a man who died fairly shortly after his gastric bypass.
Clearly people don't know how to parent anymore if Kaenan, (or whatever the kid's name was--his last name was clearly WHINER, judging from his mom's oral contributions), who had been going to this exercise clinic/study thingy since he was 9, is the norm. His mother expressed that she was powerless to get the kid to change at one point. (It almost seemed like a joke stuck in for comic relief.) That's the job of the parents. It's not all the fault of commercials and food companies and the school lunch systems in each school.
This has all been hashed and rehashed and warmed over in one form or another for the last 15 years, at least, in various news stories, docs, etc--it's just getting worse is all.