Another great video, I watched it earlier today.
I wrote about my Soil Moisture sensor project here also.
Note currently you can only have a maximum of two soil moisture modules connected to one ESP board at the same time, as only two Analog input pins seem to be exposed and available for selection in the Web Flasher. Those being pins 32 and 33 as seen in your video also.
I have reported this to the developers so hopefully they will fix and allow us to use the other Analog Inputs also. As I wanted 3x soil moisture sensors on my project now.
This is an image one of the devs sent me and he said those are the Analog input pins we should be able to use and select.
