Chrome automatically opens a video PiP window for sites that have not registered a media session action handler.

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Chrome Developers

Chrome 142 introduces browser-initiated Auto Picture-in-Picture (PiP), which automatically opens a video PiP window when users switch tabs, even for sites that haven't registered a media session action handler. The feature activates under strict conditions including audible media, a single unmuted player with a video track, no active camera/microphone use, and the user's Media Engagement Index threshold being met. Developers can opt out by implementing their own enterpictureinpicture media session handler, and can check the reason field for 'contentoccluded' to customize behavior. Best practices include keeping position state in sync via setPositionState(), maintaining MediaSession handlers during content transitions, and implementing seekto/nexttrack/previoustrack handlers for full PiP control.

Enter video Picture-in-Picture automatically on more sites