So to the main point on sugar, it is not a straw man.

Yes it is. And as you then change topic and talk about the dangers of alcohol you confirm that.

The way the human body metabolizes fructose (50% of sugar) is very similar to how it metabolizes alcohol.

It's not even vaguely similar. Fructose can be metabolised in various places and in various ways whereas ethanol cannot.

That isn't surprising because we just ferment sugar to get alcohol.

The best type of sugar for brewing is glucose. That is why "brewing sugar" is glucose..

Ok now for the videos.

Clip 1. Fructose does not suppress ghrelin. No it doesn't but it does get converted to glucose in the small intestine and that glucose DOES suppress ghrelin.

Low doses of fructose are ∼90% cleared by the intestine,

Let's look at high doses and what is considered a high dose.

High doses of fructose (≥1 g/kg) overwhelm intestinal fructose absorption and clearance, resulting in fructose reaching both the liver and colonic microbiota.

Ok let's translate that. The median healthy weight for a male is 73kg so that would mean an unhealthy dose of fructose is 73g. If the intake is as sucrose that would be 146g. 146g of sugar in one go. That is an insane amount of sugar before the small intestine can no longer efficiently convert the fructose that is there to glucose.

ie. This is nothing like alcohol metabolism.

Clip 2. Ethanol is not a carbohydrate. It has neither analdehyde or ketone group. It is an alcohol.

This is rather basic biochemistry. In fact it is so basic it could be considered basic chemistry. The "professor" in this video is not what he claims to be. Looking at his speciality it appears to be paediatrics and endocrinology and NOT biochemistry.

With that I think we are done.