YouTube TV now notifies users when the content they're watching is available in 4K. To watch 4K content on YouTube TV, you need the 4K Plus add-on, which costs an extra $10 a month. YouTube TV ...

Learn more YouTube TV features over 85 live TV channels for $65 a month. Subscribers can get the 4K Plus add-on for $10 a month for one year. The add-on costs $20 a month after your first 12 months.