I did not make the video but, I believe the "tobacco extract" refers to a solution of tobacco stems that have been left to ferment with water to develop additional enzymes to aid in the further fermenting and/or coloring of the binder and wrapper leaves. Or, just soaked stems to create a dying and darkening effect for uniform coloring. To just "restore its lost moisture" you need only water.In the video "The Essence of the Cuban Cigar - 32 minutes", at 14'50, we can ear : "the leaves used for binder and filler are than rinced with a mixture of water and tobacco extract to restore its lost moisture", than it goes to the first fermentation.
What is this "tobacco extract" ? Did you already notice this ?
If I say, "This is without a doubt the world's greatest hot dog," it is understood to mean "I really liked this hot dog." It does not mean that I believe myself to be an expert on hot dogs or that I claim to have eaten every hot dog in the world. It is hyperbole.The "how-to" posts in this forum attempt to be accurate and useful.
While seemingly authoritative, the posts above contain numerous, important errors that have been repeatedly discussed in their appropriate threads in the forum. That is disappointing. The photos are beautiful. But even some of the simplest explanations (e.g. priming levels) say one thing, but illustrate contradictory information. This is typical of magazine articles. If you have never grown tobacco yourself, all that looks impressive and definitive. It is not.
An example of misinformation is the assertion that in the Piñar del Rio, fertilizer is not used, whereas @rainmax has the tour guide of the Robaina plantation, on video tape, standing in their tobacco field in the Piñar del Rio, describing the fertilizer that they use.
Most of us have read the mythology of cigars in magazines for years. It's always fun to read, but must be regarded with a skeptical eye.