Issue#859 Added a dropdown on video page to select the preferred language

Added a dropdown on video page, so that user can choose his preferred language.
Screenshot attached below
![screenshot from 2014-03-20 16 47 46](https://f.cloud.github.com/assets/6392747/2473109/50543e3a-b03e-11e3-859d-e81f7a4ad861.png)