The YouTube TV Live Guide is where you can scroll through networks to see which programs are on right now. You’ll also see recommendations for live programs you can watch on YouTube TV. Select any program to watch the live airing.
From the Home tab:
Use the right arrow on your remote to highlight Live
Then select OK on your remote to view the Live Guide
Use up/down arrows on your remote to scroll through the channels in your guide
Select OK on your remote to select a program