На забываем нажать кнопочку CC в плеере:
<iframe title="YouTube video player" class="youtube-player" type="text/html" width="640" height="390" src="http://www.youtube.com/embed/YszbpPixi3g" frameborder="0" allowFullScreen></iframe>
<iframe title="YouTube video player" class="youtube-player" type="text/html" width="640" height="390" src="http://www.youtube.com/embed/HvX10H4QY-M" frameborder="0" allowFullScreen></iframe>
<iframe title="YouTube video player" class="youtube-player" type="text/html" width="640" height="390" src="http://www.youtube.com/embed/ZITQu1po4GE" frameborder="0" allowFullScreen></iframe>
Субтитры от IoG'а.