CIRA International's kitchen secrets; Milk from excrements?

In answer to the video "The Origin of Cow's Milk: Have we got it wrong? Scientific Miracles of the Quran Ep. 7"

16:66 directs the audience to a process it can recognize using basic observation and deduction. It says the animal milk drank by humans comes from the batn of the animal. Batn means the hidden part, ie the inside of the animal's body. It then says this milk is something in between "farthin" and blood. f-r-th means the contents of the gut in process of digestion. It isnt speaking in terms of location, it doesnt say milk comes from between THE farthin and THE blood. In the Arabic, there is no definite article. It is speaking in terms of substance. 

Milk is a substance that is between gut nutrients and blood because it contains elements from both without being completely one or the other, and could not exist without the interaction between the 2. 

Again, the Quran is pointing to an observable phenomenon that isnt beyond common sense. The blood is involved because of the appearance of the udder full of veins and the farthin because it is the absorbed nutrients in the process of digestion.