for iOS 9.1 software

Quickly take and send a photo or video. Touch and hold . Then
slide to or to take a photo or video. Tap to preview your video.
To save space, Video Messages that you receive are deleted
automatically two minutes after you view them, unless you tap Keep. To
keep them automatically, go to Settings > Messages > Expire (under
Video Messages), then tap Never.
Send photos and videos from your Photos library. Tap . Recent
shots are right there; tap Photo Library for older ones. Select the items
you want to send.
View attachments. While viewing a conversation, tap Details.
Attachments are shown in reverse chronological order at the bottom of
the screen. Tap an attachment to see it in full screen. In full-screen
mode, tap to view the attachments as a list.