Storify isn’t about fiction writing specifically – although I’m sure it could be used for that purpose. It’s more about creating non-fiction “news” stories or blog posts with different online sources: social media, pictures, news articles, Tweets, videos… pretty much anything you can think of. Create and compile online scrapbooks, product reviews, and anything else that’s made up of multiple types of media by simply dragging and dropping elements. It doesn’t get much simpler.
All sources are attributed to their original creators, so you won’t run the risk of plagiarism. As with YouTube videos, stories created on Storify can be embedded into other sites.
You can join Storify with your Twitter account. It’s in beta mode now, which means that you may be able to sign in with other accounts in the future. Check out the FAQ for more information.