I have a pre-recorded .mp4 I'm trying to make as an announcer. IE: xxx-xxxx is called, annoucement is played. I have a feeling the .mp4 is not going to be the right format. I know when making ringtones it has certain requirements to it but I can't find my notes on it. Any help would be appreciated. Do I need to upload this in the TFTP server or is it somewhere else?