<video controls src="/media/cc0-videos/friday.mp4">
  <track default kind="captions" srclang="en" src="/media/examples/friday.vtt" />
  Sorry, your browser doesn't support embedded videos.
</video>

video {
  width: 100%;
}

video::cue {
  font-size: 1rem;
  color: yellow;
}

::cue(u) {
  color: red;
}