snapshot of https://github.com/jitsi/jitsi-meet.git @ fd1749dd28f4138aa80234fc7f311b19aaffa0e7 (2026-09-15)

static/secondScreen.html

@@ -0,0 +1,30 @@
+<!DOCTYPE html>
+<html style="height: 100%;">
+
+<head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <!--
+        Marks this document as the second-screen shell. The meeting window checks
+        for it before building anything in the popup, because a load event only
+        means that something was served: a 404 body, a redirect landing or a
+        dev-server proxy response would otherwise be treated as this page and
+        silently painted over. Keep in sync with SECOND_SCREEN_MARKER in
+        react/features/multi-screen/functions.web.ts.
+    -->
+    <meta name="jitsi-second-screen" content="1">
+    <title>Jitsi Meet</title>
+</head>
+
+<body style="margin: 0; height: 100%; background: #000; overflow: hidden;">
+    <!--
+        Intentionally empty: this page is the shell for a second-screen window
+        (react/features/multi-screen). The meeting window portals the window's
+        content into it. It exists so the popup has a real same-origin URL
+        instead of about:blank: embeds rendered inside the window (e.g. the
+        YouTube shared-video player) require the page to send a valid referrer,
+        which an about:blank window cannot (YouTube fails with error 153).
+    -->
+</body>
+
+</html>