how can I tell that 4K is actually running on my feed. On amazon prime video you press info and it says either 1080 or 4K depending on how your internet is currently going. I watched alien covenant earlier and I honestly couldn’t tell it was 4K. Then I put in guardians of the galaxy 2 on UHD Blu-ray and it was so clear. Settings are 4K hdr in video and I have very fast internet.