Facebook App with portfolio

Hi, I am looking to build a facebook app where users can upload videos, audio, and pictures.. Then the videos, audios, and pictures can be searched easily as well as ranked from highest to lowest .. depending on how many votes it gets.. also, I need viral techniques to be built into this website, which means I need for this app to post things onto the live feed of users.. stating that they reached a certain level.. furthermore I want to somehow make the video/pictures/audio somehow be attached to the picture/video section of facebook... and allow users to embed videos from diff websites.. (eg youtube) Furthermore, I need all copyright to be given to me for this application and project. Thanks! I will pick the programmer with the lowest cost and most experience. Happy bidding! And I look forward to doing business with you!