That video is certainly outdated, but it is still better to eat like that than to eat highly processed foods of today. Most of that info still stands today, but there are healthier ways to eat. Hydrogenated fats in margarine are just plain bad for the body and a lot of those foods contain high levels of saturated fats. It does advocate eating balanced meals and that is a key factor in good health and staying lean. People certainly weren't nearly as fat in the 50's as they are today and the thing that changed was the introduction of processed foods (which are garbage).