Video messages are limited to just 10 seconds in length, and carry a 1 to 10 second self-destruct option. The app still offers the same options for text messages and images can be sent to contacts on the same timer anywhere from 1 to 10 seconds. And, the app will notify the person who sent you the message if you attempt to take a screenshot in order to save the message.
The update also includes a new notification system, which gives users more control over what kind of alerts are shown. The app is also supposedly faster and more reliable.
If you want to give it a shot, Snapchat is available for free in the Google Play Store.