A check for Disney+
Use one short dialogue scene. Open the audio and subtitle menus on the television and on a second supported screen using the same episode. Record the available tracks and which one actually plays. A track comparison needs the exact title or episode, not the franchise name.
Check on the intended screen
Open the app catalogue on your actual device and confirm the publisher and region. Sign in only through the service or documented billing issuer.
Keep a title-level test
Use one title, episode or fixture that you can identify. Record whether the app launches, the account signs in and the item plays.