svg-resource-fragment-identifier-video-poster.html

<!DOCTYPE html>
<style>
  video {
      width: 300px;
      height: 150px;
      display: block;
  }
</style>
<video poster="resources/fragment-identifiers.svg#red"></video>
<video poster="resources/fragment-identifiers.svg#green"></video>
<video poster="resources/fragment-identifiers.svg#blue"></video>

chromium/third_party/blink/web_tests/svg/css/svg-resource-fragment-identifier-video-poster.html