Twitter says Vine app has 40 million users

Vine, which was acquired by Twitter almost a year ago, has hit 40 million users. The company announced this milestone via a tweet earlier today. I was initially skeptic when Vine launched in January this year, but the app (which allows you to make six second videos) has genuinely emerged as a new kind of video art form and has even created its own set of Vine video stars.

Why do videos go viral on Twitter?

http://blog.twitter.com/2013/how-videos-go-viral-on-twitter-three-stories-0
If you were wondering how and why videos go viral, Twitter has the answer for you — it doesn’t really know. “There are no rules to “virality” — while some ignite, and spread like wildfire across the web, the growth of others is much more measured, like ripples spreading across a lake,” the company wrote in a blog post Monday. Bottom line: after all these years, content popularity on the internet is like playing the lottery — hey, you never know!