Make sure your mobile is set up to send MMS video messages.
If you are not sure contact your mobile service provider;Record your KIT KAT/AGT video on your mobile phone. Save the file on your mobile.
Each mobile will be different, however you will need to open your mobile´s menu and go to 'Messages' or 'Messaging' from there you will create a 'multimedia message'.
Attach your video, to do so you usually select an option like 'insert media' or 'insert video'. Once you have selected that, browse to the video you have created for KIT KAT/AGT - it might be in a folder like 'Videos' or 'My Media'. You will need to enter the number to send the video to, which is 0447 177 177.