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chromium/third_party/blink/web_tests/paint/invalidation/video-play-no-source-under-invalidation.html 

<!DOCTYPE html>
<script>
if (window.testRunner)
  testRunner.dumpAsText();
if (window.internals)
  internals.runtimeFlags.paintUnderInvalidationCheckingEnabled = true;
</script>
Tests playing video with invalid source with paintUnderInvalidationChecking enabled.
Passes if no under-invalidation reported.<br>
<video controls="">
   <source src="does-not-exist.webm">
</video>