Learn about Ipad apps
If you want to do an iMovie trailer then you have to take pictures and videos. There is no sound to the videos that you take the only sound is the music of the trailer. I like iMovie trailers better because they are short, they can be funny, serious, and a whole bunch of different things like that.
What you do on it.
You can use Nearpod for a teaching thing. Some teachers at my school use it. It is basically just a presentation on the Ipad that only your teacher or the presenter can mess with. You can't change slides unless you are the one presenting it. The presenter can send out a slide that the others can draw on.