From the home screen or the Launch screen, touch the Messaging icon.
Touch New message.
Begin entering the recipient’s name if they are in Contacts. Touch the number when it appears. You may also enter a number directly.
Type your message.
Press the Menu Key and touch Attach.
Touch Videos if you’ve already recorded a video you wish to attach, touch the thumbnail stack, and then touch the video you wish to attach. (The video must meet the size restrictions for attaching to a message. See Restrictions (size) for more information.) OR
Touch Capture video to record a new video. Press the Camera Key to begin recording and again to stop, and then touch to attach the video. (The video will automatically be recorded in MMS mode to ensure that its file size is not too large to attach.)