diff --git a/components/script/dom/htmlvideoelement.rs b/components/script/dom/htmlvideoelement.rs
index b707d9c93a1..6f27c164d02 100644
--- a/components/script/dom/htmlvideoelement.rs
+++ b/components/script/dom/htmlvideoelement.rs
@@ -233,8 +233,10 @@ impl HTMLVideoElement {
         .credentials_mode(CredentialsMode::Include)
         .use_url_credentials(true)
         .origin(document.origin().immutable().clone())
-        .pipeline_id(Some(document.global().pipeline_id()));
-
+        .pipeline_id(Some(document.global().pipeline_id()))
+        .insecure_requests_policy(document.insecure_requests_policy())
+        .has_trustworthy_ancestor_origin(document.has_trustworthy_ancestor_origin())
+        .policy_container(document.policy_container().to_owned());
         // Step 5.
         // This delay must be independent from the ones created by HTMLMediaElement during
         // its media load algorithm, otherwise a code like
diff --git a/tests/wpt/mozilla/meta/MANIFEST.json b/tests/wpt/mozilla/meta/MANIFEST.json
index b6782318356..2ef84bb18a6 100644
--- a/tests/wpt/mozilla/meta/MANIFEST.json
+++ b/tests/wpt/mozilla/meta/MANIFEST.json
@@ -14178,6 +14178,13 @@
       {}
      ]
     ],
+    "video_poster_csp.sub.html": [
+     "cc5dfd54c1e39904d5c919f6bd6840d65dcc0fa8",
+     [
+      null,
+      {}
+     ]
+    ],
     "weakref.html": [
      "4deccbe1e26a3f921eea85a4395394a55cc88be4",
      [
diff --git a/tests/wpt/mozilla/meta/__dir__.ini b/tests/wpt/mozilla/meta/__dir__.ini
index a57c0286b12..925f07e1c50 100644
--- a/tests/wpt/mozilla/meta/__dir__.ini
+++ b/tests/wpt/mozilla/meta/__dir__.ini
@@ -1,3 +1,4 @@
 prefs: [
   "dom_urlpattern_enabled:true",
+  "media_testing_enabled:true",
 ]
diff --git a/tests/wpt/mozilla/meta/mozilla/video_poster_frame.html.ini b/tests/wpt/mozilla/meta/mozilla/video_poster_frame.html.ini
deleted file mode 100644
index a8b5c2da0c5..00000000000
--- a/tests/wpt/mozilla/meta/mozilla/video_poster_frame.html.ini
+++ /dev/null
@@ -1,2 +0,0 @@
-[video_poster_frame.html]
-  expected: TIMEOUT
diff --git a/tests/wpt/mozilla/tests/mozilla/video_poster_csp.sub.html b/tests/wpt/mozilla/tests/mozilla/video_poster_csp.sub.html
new file mode 100644
index 00000000000..cc5dfd54c1e
--- /dev/null
+++ b/tests/wpt/mozilla/tests/mozilla/video_poster_csp.sub.html
@@ -0,0 +1,25 @@
+<!doctype html>
+<meta http-equiv="content-security-policy" content="img-src 'self'">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<video></video>
+<img></img>
+<script>
+  // This test sets up a cross-origin image URL for the video poster
+  // and verifies that the poster image is not shown.
+  // It also uses a separate image load to control when to end the test,
+  // since Servo doesn't fire any event handler if a poster image has an
+  // error (https://github.com/whatwg/html/issues/8445).
+  async_test(t => {
+      const pathparts = location.pathname.split('/');
+      const testfile = pathparts[pathparts.length - 1];
+      const url = location.href.replace(location.hostname, "{{hosts[alt][]}}").replace(testfile, "poster.png");
+      let img = document.querySelector("img");
+      img.src = url;
+      img.onload = t.unreached_func();
+      img.onerror = t.step_timeout(() => t.done(), 500);
+      let video = document.querySelector("video");
+      video.onpostershown = t.unreached_func();
+      video.poster = url;
+  });
+</script>
