I've never claimed anything for post workout carbs, I don't really care about meal timing just daily macro count. The only noticeable difference I've found for meal timing is for when I have my preworkout mcdonalds bacon and egg mcmuffin. If I have it too close I restate it but if it's too far away during heavy squats and deads my stomach feels empty and crushed.
Unless you are taking insulin you don't really need to worry about when you eat your carbs as your body is amazing at restoring them, as long as you've had some carbs between workouts you're good doesn't matter if it's 20mins after of 8hours after.
I haven't seen the video but I believe the premise is correct.