I'm having some issues with the BT Home hub, TP-link Tapo app and IP camera.
I can connect the IP camera  through the Tapo app without issue.

It is connected to the BThome router as I can see it in the BT Smart Hub Manager \ my network \ my devices.

It's using 2.4 ghz band and I can ping it from my PC.

I have 2 problems:

Problem 1:  In the Tapo app.  When it is first setup and I can click and view the stream.

However as soon as I come out of the device (still in the app), it disappears from the list of devices, even though the router shows me it's still connected to the network.
 

What am I missing?  Is there something blocking the device access through the app.
Is it my phone? Android?

I can reset the device, go through the initial setup and it appears briefly before disappearing again? 

Problem 2
I want to be able to view this outside my home network.

When I am able to connect to device after initial setup.  It says that external access is not available.
Is this a port forwarding issue.  It recommends that I change my dns to 8.8.8.8, not sure why that would help.

Any advice would be greatly appreciated.

P