Design an App Mockup

We want to create an application UI. The app will be developed on Android & IOS platforms for both Tablets & Phones. This is an Sports Learning Application. Users should learn techniques used in sport(s) using this application. Like grip, balance, technique etc. App Flow 1. Registration / Auto Login. -> Profile Information. Registration using Facebook & Twitter allowed. 2. Preferences - Selection of Sport 3. Select a Category - Eg -> Batting, Bowling, Fielding (Cricket). Defence, Goal Keeping, Heading (Soccer). 4. Progress Tracker - Shows the videos watched and progress on that particular section. 5. Bookmarking & Sharing on each Video. 6. Articles (Based on each category) -> Posts can be videos, audio or text. 7. Ask an Expert - Upload / Record your Video, Write text. 8. Inbox - Replies / Threads of Ask an Expert in this view. Push notifications will come for each activity. 9. Video Player design -> This is the heart of the application. This should be the best section in the application. 10. Comments on each post.