If you try it or switch, let us know what you think of the video quality between it and HBR ATT
Soo I added myself to my mom's Family and did some general testing, I love the fact that they have stats for nerds (some channels are only 720p), sofar I can't find any 5.1 audio via the Android TV version or the WebOS version but the WebOS Version does trigger the Dolby logo on my receiver indicating that the TV is pushing Dolby but only 2.0, unfortunately on the Android TV side the Audio is PCM 2.0, which is pretty common if the audio is AAC , I experience this on Plex withy movie Collection which is in AAC.My mom has it on her account, so I may add my other email to her family and test it out when I get back from my anniversary trip in a few weeks. Or I could ask Achilles to addecto his family temporarily heehee
On the video side, seems like compression is more with less Bitrate compared to high Bitrate on AT&T TV HBR, 4K might be a way to counter act this as the video scaling seems to be horrible on the android side, but best I can say is YouTube TV's Quality = YouTube Quality but with Protection in the Stream.
Also side note: Data usage seems to be lower on on YouTube TV which less me to believe it's the compression.
Though I'm tech Savvy I'm not a Professional so by all means, if there are those who are better and have the proper tools etc please feel free to correct anything that I have stated.