It does sound pretty weird. I've browsed comments by those that have lost weight and many include their calorie counts, which are low enough to cause weight loss. If choosing a 'window' when you can eat helps you eat the right amount of calories over the course of the day, then it will help weight loss. But eating that same number of calories spread out thru the day will also cause the same weight loss. There's nothing magical about lumping them together unless it's forcing you to pay more attention. If you eat more than you need to lose or maintain then you will still gain weight.
He notes that this is not for obese dieters, just those that qualify as 'overweight'. He states that if you are obese, you should be monitored by your physician if you try this.
So overall, it sounds like a new gimmick to get you to restrict your calories. If it does that, then it will work and as long as you eat healthy foods and feel ok then there you go
For the record, I spent many years eating this way. I'd get up and go to work without breakfast, work through lunch and not have a bite to eat all day, then would eat dinner and snacks at night. My weight gradually increased over the years, not the other way around. But I wasn't counting calories or choosing the healthiest foods. I was tired and hungry.