A TV build and a phone build of the same app can behave differently.
Step 1: prepare
Write down the device, player version, connection and what you want to measure for Android TV IPTV players. A TV build and a phone build of the same app can behave differently.
Step 2: run the check
Check remote focus, back behaviour and the on-screen keyboard. Test a second example and make one controlled change at a time so you can tell what made a difference.
Step 3: decide
Record the result, full price and support response. Installing an unverified APK or the wrong device edition. Repeat the test if the comparison was made on a different network or time of day.
What to do next
Open the relevant brand page and check the original supplier information before ordering. For a technical issue, write down the device, player, connection and one reproducible example. For a price question, ask for the full charge in the currency you will pay.