Per the video - it seems that with the cleanup from the corrosive fluid that process leads to a couple more steps than a torch set-up although I don't know which method would anneal the brass better . Interesting though , as usual more than one way to skin a cat .
LOL. The cleanup from the "corrosive fluid" (i.e. molten salt) is just rinsing in water. That's it.
Most of us doing this just drop the annealed cases in a bucket of water. That dissolves the salt, and isn't any more work than when people who torch anneal drop their cases in water.