Most of the fasting world doesn’t speak of dry fasting for one very simple reason.It can get very bad, very quickly if not done right.That is not the case with water and intermittent fasting. For dry fasting you need to do alot of research, prepare yourself mentally and physically.The average person is not capable of this, will jump in with eyes closed, and might end up harming themselves. Be very careful with your YouTube channel.
Transitioning from dry to water fast is quite simple and relatively easy. However, electrolytes when switching are an absolute must imo.
Also, for what reason would you want to do a fast that long ? Taking on such long fasts is not really recommended.