Unitl now Mobile Apps store, only shows the captured screenshots of the accompaying application to provide buyer a glimpse of the functionality. In reality, it's really hard to convey what some applications actually do through the use of static screenshots. A few weeks ago Android team announced support for official promotional videos for Android apps to help shoppers see an app in action before making a purchase.
While we wait for Android to make happen, a third-party portal AppsFire, begun integrating the video demos into their own listings via the Android Market API.
Ouriel Ohayon, a co-founder of AppsFire, pointed out that approximately 500 apps in the Market have a demo video, and it's likely many more will follow.