Method 1: Change system notification sound. Method 2: Change Snapchat notification sound. How to turn off Snapchat notification sound. Method 1: Turn on Silent mode. Method 2: Turn off Snapchat notifications. FAQs. To do this, open the Snapchat app and record a video by pressing and holding the Record button in the center of the app’s camera view. To save a Snapchat video you’ve recorded, tap the Download button in the bottom-left corner. The recorded video will now be available in your device’s camera roll for you to use elsewhere.