Create app preview video for my mobile app

Hi, I am going to release my portal plus mobile app for Android, IOS and WP. I want an App Preview Video to upload in store and for marketings. - The video must meet all iOS App Preview standards. And provide video in all dimensions needed for iTunes Connect(App Store) - The video must tell all features of app and web (I will give you the list of features) and must be professional. - PM me for more details and pls provide some of your works -Video must include voice over. Thanks