I agree with sdesol. Why should I use this app when I can just tweet a celebrity from my account? What is the advantage of doing it this way? Wouldn't the celebrity also need to have a Chance account in order for them to respond in this way?
So the Influencer would see the video request come in on Twitter where he can view it in line OR click the link and view it on a unique landing page.
There's a call-to-action in both options that prompts the Influencer to download the app in order to reply..
Here's an example of this already happening - https://www.chance.fm/w/679/