MMS messaging

I have a video that I want to create an MMS message with to send to my friends. The video is over 30 seconds so my mms will not send the message. I have an xv6700 Verizon phone (by the way). I have recieved numerous MMS messages over 30 secounds so I don't understand why I cannot send one. I want to know how people make all these message and send them. I have searched for 3 hours for a desktop MMS creator with no avail. If someone knows how to create messages to send over my phone please let me know. Thanks for your help.

That's a good question, I wouldn't mind knowing this as well.