[Webkit-unassigned] [Bug 259577] New: [GTK] [GStreamer] Youtube videos bypass the autoplay "only without sound" setting, even when opened in new tabs / pages

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=259577

            Bug ID: 259577
           Summary: [GTK] [GStreamer] Youtube videos bypass the autoplay
                    "only without sound" setting, even when opened in new
                    tabs / pages
           Product: WebKit
           Version: WebKit Local Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKitGTK
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: nekohayo at gmail.com
                CC: bugs-noreply at webkitgtk.org

With Epiphany 44.5 + WebKitGTK 2.40.3 + GStreamer 1.22.5 from Fedora 38, and the default "Media autoplay: Without sound" state, on Wayland GNOME,

1. Launch the browser
2. Open a private window (just to be sure)
3. Go to Youtube.com
4. Middle-click the title text of one of the videos there, so that it opens in a clean new tab
5. Do not click anything else, do not interact with any page element, just wait.

Result: the newly opened tab autoplays (with sound, even).

P.s.:
At step 4, instead of middle-clicking you could also simply left-click to load a new page replacing the current tab's contents; I used the new tab technique just to ensure that it wasn't a case where YouTube "fakes" loading a new page but actually just replaces the current page within the current tab, but apparently that's not the case.

I'd expect autoplay to work automagically only if a page is using WebRTC videoconferencing.

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