@TeamYouTube Quality of service in 01740 seems poor today. @Speedtest shows I have 20–30 mbps, but YouTubeTV takes almost 10 seconds to load any channel, and then it serves low resolution video for about 5 minutes then switches to high res.
Just wanted to add that I started experiencing this on both my Apple TV 4K devices a couple days ago. Channels take ten seconds to load. I have 200 mbps XFINITY. iPad and iPhone run the app just fine.