Sleep timer for YouTube documentaries

YouTube has no reliable built-in sleep timer on every device. People use phone Focus modes, third-party apps, or smart plugs. Here is the practical map.

Common approaches

• Phone sleep / Focus timer that pauses media after N minutes
• Browser extensions (desktop) that stop playback
• Smart speakers with a timer command
• Downloaded files in a player that supports fade-out

What is still missing

A calm documentary library where the timer is first-class: fade volume down, stop, and never autoplay into something loud. That is the SleepDocs bet.