My answer will be no for those links. And while a GoPro has a wireless link you have to check if anyone set up how to use it in your video chat app.
So the answer is clearly there are wireless webcams. But with each one you must ask the maker and seller if they have setup instructions for use in your video chat app.
I'm looking for a portable, wireless (NFC/Bluetooth), camera that connects to my phone, that I can use to video chat with rather than using the camera in my phone. Do any exist, because I can't find them.