You should be good looking, have great stage presence, a pleasing voice, and you should know how to give a pleasing video presentation of an app, starting with talking about the benefits of the app and then showing how to use it. This will require some skill and experience. $50 per presentation is my budget. I will expect you to sign a model release because the video thus produced will be used for advertising purposes online and offline.
Bids are invited from US/Can/EU/Aus/NZ