Hi all,
So I managed to get Netflix and Amazon Prime to work through a convoluted way, as follows (on up to Android 8. This will not work on Android 9)
1. Download the following Android apks on your android device/tv:
a. VirtualXposed (https://vxposed.com/)
b. Netflix
c. Amazon Prime Video
2. Install VirtualXposed
3. In VirtualXposed, install Netflix and Prime Video. Make sure you grant permissions.
4. In VirtualXposed, launch Xposed Installer.
5. In Xposed Installer, go to 'Download' and search for "BlockSecureFlag". Go to versions, download and install latest version. Go to 'Modules' in Xposed Installer settings, and tick 'BlackSecureFlag'.
6. Launch BlockSecureFlag from VirtualXposed. Tick both Netflix and Prime Video, and click on the save icon.
7. Go back to VirtualXposed, go to settings menu and select reboot.
8. Launch either Netflix or Prime Videos and profit $$$
edit:
The android screen grabber works with Netflix App for phone but not Netflix App for TV.