Is there a chance you can do something like yourtube? Download a video from YouTube app, save it to iTunes app, able to upload and to share the video to any social website; all this right from the YouTube app. If yes you can do it then it will be very good. Place it in cydia as a tweak which can inbed in YouTube app, I don't care how much you will sell it, just make sure that it's less than $20 and make very sure that you will provide updates for it for every ios upgrade version and I will buy it once you load it in cydia. Welcome to the forum.