I bought a vu 43ga smart tv, I also own a android box. I played a 1080p video on both Native YouTube tv app and Android box.
Android box YouTube app gave better video output as compared to Native YouTube App. Also I have changed the native resolution to 1080p from 720p using adb. Still the clarity is no where near the android box output.
Is there a way to improve the OS experience because TV does great in android box.
Did you compare the "stats for nerds" of the video on both devices? It could be a difference in codec.
Also, what android box are you using?