Intent to Implement and Ship: Pause autoplaying muted video when invisible (Android)

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Zhiqiang Zhang

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9 Feb 2017 09.49.1709/02/17

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A pull request to the HTML spec change is here:

On Android, muted videos with autoplay attribute will start autoplay when they become visible. The change of behavior is to interrupt autoplay when they become invisible. This will only apply to videos with an autoplay attribute, which are started when visible.


The motivation is to reduce the power usage. An extreme case is when a infinite scrolling page has a lot of muted videos with autoplay attribute. Before this change, we will continue decoding these videos even when they come off the viewport.

Interoperability and Compatibility risk
This only apply to videos that are declared as autoplay but not videos that start playing with play(). We are already delaying the playing until the video is visible. Finally, it has launched on Safari iOS.

Firefox: No public signals
Edge: No public signals
Safari: Shipped
Web developers: No signals (anecdotally, we were asked for this by a developer at BlinkOn)

Ongoing technical constraints


Will this feature be supported on all six Blink platforms (Windows, Mac, Linux,
Chrome OS, Android, and Android WebView)?

No. This feature is Android only (including WebView).

OWP launch tracking bug

Link to entry on the Chrome Platform Status

Requesting approval to ship?


Zhiqiang Zhang

Philip Jägenstedt

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9 Feb 2017 13.49.3809/02/17
kepadaZhiqiang Zhang,

The HTML PR is now merged, with the interesting bits appearing here:

I have filed to track the unfortunate fact that there's no way to test autoplay in web-platform-tests currently, and I filed bugs on some browsers:

Chris Harrelson

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9 Feb 2017 14.52.1509/02/17
kepadaPhilip Jägenstedt, Zhiqiang Zhang,

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9 Feb 2017 18.14.0509/02/17

Jochen Eisinger

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13 Feb 2017 03.17.3613/02/17
kepadaChris Harrelson, Philip Jägenstedt, Zhiqiang Zhang,

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