Hey, I`m a Director, Animator and a student of Psychology, and here is a simple (yet Effective) suggestion for your Ad:
In the last scene, Instead of using a simple Zoom in, use Vertigo Effect (Dolly Zoom), it has Five Advantages over Simple Zoom:
> It's mostly used in high budget films, adding the extra value of your app to the viewer`s mind.
> it psychologically sends a signal to viewer that something very Interesting and Important is about to happen.
> It focuses the viewer`s attention to the center of the screen (where you can show the logo of your app)
> It looks cool making a connection between your app and viewer.
> It's easy to feature it in animations.
If you feel like this information was of any use, please let me know, I would love to hear from you. Thank You.