With the number of apps we use daily increasing we are more and more getting app savvy everyday. We use all kinds of apps entertainment, productivity, utility and more. On the other hand when it comes to an App developer or App marketer the task of getting noticed among millions of apps is quiet a challenge.
App promo or App promotional videos are used by many companies to connect with the user and pitch the benefits all in 30-60 seconds. Promo videos of apps significantly increase downloads. Each app is unique and so are its users, creating a good app video can definitely set you apart.

For more you can check Examples of mobile app promo videos ,on Advids' Blog.