Based on looking at other posts that go ignored in the ‘android-tv’ and ‘livetv-dvr’, tags, it looks like the Android TV player is pretty much ongoing betaware and using it is WYSIWYG. I bought the lifetime Plex Pass for Plexamp (which is totally awesome and actively supported). Live TV and DVR works good on mobile and Android TV works for the most part. It just seems PIP for OTA channels on Nvidia Shield should work. It works great on my ROKU, but ROKU performance (loading channels) is way too slow compared to the more high powered Nvidia Shield streamers.