I developed a similar product a few years ago.<p><a href="http:&#x2F;&#x2F;lingomill.appspot.com" rel="nofollow">http:&#x2F;&#x2F;lingomill.appspot.com</a><p>I would love to connect with you. The product uses subtitles and vice video segments to teach people a language. Dual subtitles are the key.