I do question the statement that meat causes the same insulin release as pure sugar. In my case, I typically have a breakfast of 4 eggs fried in coconut oil, 4 strips of bacon, and coffee. If I check my blood sugar within an hour after eating, it is usually around 110. A breakfast of hash browns, whole wheat toast and two eggs would spike it into the 160's.
A dinner of Asian takeout heavy on rice can spike me into the 180's. A large grilled steak with grilled vegetables usually keeps me under 120.
Protein Can be converted to carbs, which is why the first video explains that in order to reach a ketogenic state, you must limit protein as well as carbs, and consume the majority of your food intake as fat.
i also have seen the weight loss result on myself. Weight loss was not even a goal when I started, and the weight just fell off. Lost 20 lbs without even trying, while eating as much as I wanted. I eat pretty much as much as I want, whenever I want, and my biggest problem is trying to gain weight. In fact my biggest concern with the low carb plan is whether it will adequately support muscle growth, since insulin does help with muscle development, according to many sources.
Before switching to low carb, I was trying to eat "healthy", as typically described in the popular press: cut down on red meat, less fat, more whole grains, and restrict calories. My blood sugar was getting worse, and I was hungry all the time, and still had a small spare tire at my waist, so I did a lot of reading, and I realized I might have been doing the exact opposite of what I should be. so I changed approaches and have been happy with the results.