chromium/third_party/blink/web_tests/compositing/video/video-neg-offset-outline.html

<!DOCTYPE html>
<link rel="match" href="video-neg-offset-outline-expected.html">
<title>Test video with negative offset outline</title>
<style>
video {
  will-change: transform;
  outline: solid orange 120px;
  outline-offset: -120px;
}
</style>
<video width="320" height="240" controls></video>