How to build a paid video app?

Hi , I am new here. I Want to build a paid video tutorial app. Can any one help me in following points.

  1. How to store video in this case? i dont want you tube or vimeo, I want inbuild video with app. is It Possible.?
    2 . I want user to first subscribe the app after download and then use. Can any one guide me how to do that?