After a long dialogue with the client we have conducted a market research and decided not to make advertisements, but to work on the principle of mass advertising in communities.
We have create a 2D-movie, which is which is understandable without music. The movie focuses on a simple description of the app's functionality and its capabilities. We used corporate colors and app's style.
Finally: 1 month to create a minute video and 2 months of Internet promotion.