Twitter launched its new social network app, Vine a few days ago. Probably you don't know what it is judging by its name and that’s what this post is for: give you a general idea on how this new social app works.It’s very much like Instagram, if you have ever used it. Instead of still pictures, users upload videos and they are of fixed duration, 6 seconds. That would be boring if it’s just a 6-second video without any fun part. It actually can be composed of many parts, like a mini film.