chromium/third_party/blink/web_tests/media/controls/slow-doubletap.html

<!DOCTYPE html>
<html>
<title>Test that player will not jump if the tap is too slow.</title>
<script src="../../resources/testharness.js"></script>
<script src="../../resources/testharnessreport.js"></script>
<script src="../media-controls.js"></script>
<video controls width=400 src="../content/60_sec_video.webm"></video>
<script>
async_test(t => {
  const video = document.querySelector('video');

  video.onplaying = t.step_func(() => {
    // Double tap on the left side.
    const coordinates = videoLeftEdgeCoordinates(video);
    doubleTapAtCoordinates(
        coordinates[0], coordinates[1], 400, t.done.bind(t));
  });

  video.addEventListener('fullscreenchange', t.unreached_func());
  video.addEventListener('webkitfullscreenchange', t.unreached_func());

  video.play();
});
</script>
</html>