[Webkit-unassigned] [Bug 163570] New: Last player wins when multiple video elements have 'autoplay', 'muted' and 'playsinline' attributes set

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=163570

            Bug ID: 163570
           Summary: Last player wins when multiple video elements have
                    'autoplay', 'muted' and 'playsinline' attributes set
    Classification: Unclassified
           Product: WebKit
           Version: Safari 10
          Hardware: iPhone / iPad
                OS: iOS 10
            Status: NEW
          Severity: Blocker
          Priority: P2
         Component: Media Elements
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: evol at jwplayer.com

There are a couple scenarios that I'm seeking clarification on as to whether they are bugs or are working as intended.

Test page: http://demo.jwplayer.com/browser-examples/safari-autoplay.html

On an iPhone with multiple videos on the page:

1. In portrait mode, where there are multiple videos in the viewport, the last video to load is the one that starts playing.
2. In landscape mode, the behavior is as expected with videos playing/pausing as they enter/exit the viewport. However, I'm curious if videos above the fold should resume playback when you scroll up to bring them back into view. According to the documentation: "<video autoplay> elements will pause if they become non-visible, such as by being scrolled out of the viewport." But this does not speak to the use case of resuming playback of a video if it becomes visible again. 

Getting the above 2 scenarios resolved would be a huge win for us at JW Player.

Thanks,
Evol

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