Animation or Video instead of Default.png (Iphone app)

I saw in many application like Zara, Zara Home, D&G.. that instead of using the Default.png image for loading the application, they use a video instead. Did someone know how to do it?

Did they manage to r开发者_高级运维eplace the Default image and put an animation instead or just load an animation in the ApplicationDidFinishLaunching

Thanks,

They just load an animation in applicationDidFinishLaunching and replace the image with it.