How to Send a Video Through an iPhone Text
Videos taken with the iPhone can be trimmed and shared right from your device. In addition to posting the video to a sharing site, like YouTube, you can also attach the video to an email. If your friend has an iPhone or other device that supports video messages, use your iPhone to send the clip in a text message. Adding a video to a text message only takes a few seconds.
Tap the green "Messages" icon on your phone's home screen.
Tap on your previous conversation with the contact who you want to send the video to. If you have never had a previous conversation with the person, tap the square icon in the top right corner of the screen to start one. Type her name as it is stored in your contact list or her phone number in the "To" field.
Tap on the camera icon just to the left of the text field, right above the keyboard.
Select "Take Photo or Video" to capture a new video, or "Choose Existing" to use a video currently stored in your camera roll. If you take a new video, tap the blue "Use" icon to attach it to the text message or "Retake" to shoot something different. If you use a previously recorded video, tap on it once in the camera roll and then select the "Choose" icon.
Tap the "Send" button when you are ready to send the text.