(Edit: I want to add that 16/8 DOES work for losing weight (mostly because you eat less), and I think it helps focus your attention on what you are eating and gets your digestion into a "cycle" instead of always piling more food into the system. I think the point of the video is that it does not cause autophagy)
So those little rodents they based 16/8 intermittent fasting on have metabolisms 16 times faster than ours. Watch the video, I think it said we have to fast a week to get the same effect as a rodent fasting 16 hours. But he does mention eating according to the circadian rhythm (eat when the sun is out). youtu.be/zC9_g01disc