I have to confess I don't spend a lot of time taking videos of any kind. I'm not sure why; I've just always been more into photos. But I do really like Vine. I wish more people would use it -- especially for videos that do not need to be longer than 6 seconds. There are lots of times when this is true at least with most of the videos I've seen shared by friends on Facebook. :) I can see how Vine would be great to give a very brief teaser for a library program or some new books being added to the collection or a new service -- really the possibilities are endless there.
However, I'm looking for something that I could use to make book trailers and promo videos for our summer reading program, so I wanted an app that allows you to make a video that's longer than 6 seconds. After reading through the apps listed for this Thing, I decided to try Socialcam. It was very easy to use and within 2 minutes of downloading it, I had already created my first, very short, video to test it out. I can see how this would be a great app to use for all kinds of library stuff!