@YouTubeTV on my Roku streaming stick 4K, all streams start to stutter after a couple of minutes. Changing the channel to a different stream and then back again fixes it momentarily.
That doesn't seem right. Have you tried restarting your roku device? Try to update the roku system software to the latest version. Also, remove and re-download the YouTube TV channel. Let us know if you run into trouble and well look into it.