An interesting idea and potentially useful, but I could not get it to work in the latest version of Firefox.<p>The design has a lot of moving parts. I clicked on a mainpage link and then play and it stated "loading". After a minute or so, I noticed some pulsing green concentric circles. A few seconds later I saw there was some text telling me to log in. So I tried. Ooops no account. So I signup. I get a server error. Back out and refresh the main page. Go to signup link. Fill out form again. Failure because the email address already in use. So I login, select a video, push play, and wait. Nothing plays after a minute. I try using the back button for my browser. It's been broken by the website. Close tab.<p>I still don't know what the site actually does. I recommend simplifying the demonstration down to the core obvious functionality and creating a clear call to action using small steps for the user.<p>Think about it as having a novice level and an expert level. New users start at the novice level, experts approaching the understanding of the development team will benefit from information that overwhelms the novice user.<p>Good luck.
I would like to remark a link to a complete review in chinese, including a video, from Esor Huang: <a href="http://www.playpcesor.com/2016/03/lingorank-ted-talks.html" rel="nofollow">http://www.playpcesor.com/2016/03/lingorank-ted-talks.html</a>