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Test B — Baseline + iframe referrerpolicy

Subdomain: b.yt.jaan.md

Purpose: Same iframe params as Test A, plus the explicit iframe-level referrerpolicy attribute.

Video ID: RTIPjOEVZIE

Configuration

<iframe
  src="https://www.youtube.com/embed/RTIPjOEVZIE?autoplay=0&controls=1&modestbranding=1&mute=1&rel=0"
  title="Test B — Baseline + iframe referrerpolicy"
  width="640" height="360"
  referrerpolicy="strict-origin-when-cross-origin"
  allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share"
  allowfullscreen>
</iframe>

Instructions

Click the native YouTube play button and watch at least 60–120 seconds.

Expected learning

Tests whether the explicit iframe-level referrerpolicy attribute changes attribution beyond the server-level header. If Test B appears in YouTube Studio External Sources but Test A doesn't, the iframe attribute matters even when the server header is the same. If both behave the same, the attribute is redundant on top of _headers.

QA checklist

1. Open DevTools → Network.
2. Find the request to youtube.com/embed/RTIPjOEVZIE.
3. Confirm the Referer header is https://b.yt.jaan.md/ — not absent, not no-referrer.
4. Confirm no YouTube Error 153 in the player.
5. Play manually and watch 60–120 seconds.
6. For Test F, confirm DevTools console logs [YT_TEST] … READY and [YT_TEST] … STATE PLAYING. (Not applicable on this page.)