Before the test
A 4K TV model does not determine the resolution, frame rate or HDR of a particular feed.
One test result
Use the same screen and programme for one short control run. Record the app version, network path and which feature worked. Keep all account fields private.
Decision record
Write down any terms the provider supplied and which two features are essential. Keep results for the guide, playback and account access in separate columns.
Find which device is producing the picture
Record the source details, active input and display mode on one supported item. Repeat after changing only the native-versus-external player route.