Sorry for the inconvenience, but if you have iOS 6, you can save your rage face videos to your photo library and then select them manually from iMessage.
In order to send your rage face videos by SMS from within the app, you need iOS 7.0 or greater.Watch, laugh out loud, and easily share your video with friends by SMS, Facebook, Youtube, Instagram or Email.Record your own voice or apply any of the hilarious library sounds.Position the mouth for each new character.Easily save your rage face videos to your Photo Album, and within the app library.Share rage face videos with friends on YouTube, Facebook, Instagram, Email and SMS!.