[Webkit-unassigned] [Bug 163993] New: Autoplay muted videos stop playback of any streaming app in the background

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=163993

            Bug ID: 163993
           Summary: Autoplay muted videos stop playback of any streaming
                    app in the background
    Classification: Unclassified
           Product: WebKit
           Version: Safari 10
          Hardware: iPhone / iPad
                OS: iOS 10
            Status: NEW
          Severity: Critical
          Priority: P2
         Component: Media Elements
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: ibrahim at ennafaa.com

Summary:
We use autoplay inline muted videos as introduced in iOS10 by Safari browsers. However, when an app is streaming music in the background and we start the video (even muted), the playback of the background app is stopped.
In a recent blogpost on the Webkit blog (https://webkit.org/blog/6784/new-video-policies-for-ios/), these new features were named as a way to replace the animated GIF format. But for the moment, the user experience is disappointing when it comes to this use case. Many of our users are complaining. 

Steps to Reproduce:
1. Open any background streaming sound app 
2. Play a sound
3. Press home button (sound is still playing in the background)
4. Open Safari and load http://misc.teads.tv/demo/product/breitlingWithLogo.html
5. Scroll until you see the video (it will automatically start)

Expected Results:
A good user experience would be to stop the playback only if we activate the sound on the video (user initiated). I guess this is why the requirements around autoplay videos are to have the video muted at start and un-muted only after a user action.

We would expect that a playing muted video doesn't disrupt with a streaming background app playback as long as the video stays muted.

Actual Results:
The playback of the streaming sound app is stopped when the muted video starts on Safari. 

Version:
Safari 10.0 (iOS10)

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