YouTube TV users get the option watch video in higher quality, within all programs including live broadcasts. Google is introducing a new setting called 1080p Enhanced for subscribers YouTube TV a Primetime channels. 1080p Enhanced settings enhances the existing 1080p resolution with an increased data rate.
Google confirmed the update after a user reported it on Reddit. According to the answer, the 1080p Enhanced setting provides the highest video quality yet possible. Reddit users who already have access to 1080p Enhanced report that the resolution is available for all channels as 1080p60.
This means that all YouTube TV and Primetime channel subscribers with an updated 4K compatible streaming device should be able to access the new video quality setting option. However, Google discovered bug that prevents users from being able to choose this setting manually. But now work is already underway to eliminate this problem.