Hey GLS. the cost thing and caffic acid thing were exaggerated by the guy in the video, he's a coffee guru I guess, and he's just repeating internet gossip.  It really as expensive as anything else you might use 1shot...  and people ( here on this very site! ) have tried just caffic acid ( sans café ) and it didn't work..  ... it's only inexpensive if you make a gallon of strong caffenol, spike it with something and use it for more than 1shot ( like I do ). it ends up lasting about 6months, and able to process ( film and prints ) costing about 1cent or less / roll or sheet of film, print.  The point ?  

. There is no point, of any of it!  

. You know. like using pyro or dk50 or edwal10 or ID11 or D76 or HC110 orX-tol or ...  other than its a developer and it works great.  People kid themselves thinking their developer does something magic or its made by woodland fae ..  in the end its just developer ...