On mobile devices, the bedtime reminder lets you set specific times when you want to get a reminder to stop watching videos and go to bed. You can have the reminder interrupt your video or wait until the video ends.
You can set a sleep timer if you want the video you’re watching to automatically pause after a certain time.
Note: For users aged 13-17 on YouTube, the bedtime reminder is set to On by default. For users 18 or over, the default setting is Off. All users can change this setting at any time.
Set a bedtime reminder:
- Tap your profile picture
.
- Tap Settings.
- Tap General.
- Next to Remind me when it’s bedtime, tap the switch to On
or Off
.
- If switching to On, select a start and end time for the reminder and tap OK.
or Off 
.
Tip: You can also set bedtime reminders by tapping your profile picture 
Time Watched.
Time Watched.If you want to finish your video before seeing the bedtime reminder, select Wait until I finish video to show reminder when setting up.
You can snooze your bedtime reminder, which will temporarily turn off the reminder for 10 minutes. Your video will start again without interruption. After 10 minutes, the reminder will appear again.