Hey Bucky !
I do have the following setup for wireShark , I am running a desktop windows 8.1(only ethernet) and a laptop windows 10 (both Wlan and Lan) .

I followed your youtube toturials about wireshark and You have lost me on the 3rd video , where u have said , I have this interface (TP-Link) and you do have all the permissions open on Linux . but you were using wireshark on Windows...
my current state with wireshark is that I can only see my own traffic.

I have installed acrylic WiFi professional on my laptop to be able to listen to other signals "monitor mode" BUT I understood nothing from the traffic ! I can post picture of what I was having on my screen.

I do need your professional help =)