title: How to force YouTube subtitles (closed captions) to appear by default even on iOS?
body: <p>I own a YouTube video, and I typed up subtitles for it.</p>
  
  <p>I've tagged it with <code>yt:cc=on</code>, and I've embedded its iframe onto my website using <code>cc_load_policy=1&amp;cc=1</code> (see <a href="https://developers.google.com/youtube/player_parameters#cc_load_policy" rel="nofollow">docs</a>).</p>
  
  <p>When I visit my webpage using Chrome on my desktop, the captions appear by default, which is the desired experience.</p>
  
  <p><strong>But when I visit the webpage using my iPhone (Chrome on iOS), the captions do <em>not</em> appear by default.  How can I make captions appear by default on iOS?</strong></p>
  
  <p>(They are available if I click the speech bubble icon, but I don't want users to need to know how to do that.)</p>