enable local course-introduction-video

enable local course-introduction-video:

![preview](http://www.idefs.com/wp-content/uploads/2014/09/Open-edX-dev04.png)

![preview](http://www.idefs.com/wp-content/uploads/2014/09/Open-edX-dev05.png)

![preview](http://www.idefs.com/wp-content/uploads/2014/09/Open-edX-dev06.png)

![preview](http://www.idefs.com/wp-content/uploads/2014/09/Open-edX-dev08.png)