This tutorial will show you how to turn off video autoplay for the Facebook app on your iOS device (iPhone, iPad, or iPod Touch). Video autoplay can eat up a lot of data if you are browsing Facebook without being connected to WiFi. You can either disable autoplay or only autoplay videos when on a WiFi connection.
How-to Disable Facebook Video Autoplay
1. Open Facebook
2. Press More on the bottom bar
3. Press Settings
4. Press Account Settings
5. Go to Videos and Photos
6. Press Autoplay
7. Select Never Autoplay Videos or On Wi-Fi Connections Only (if you want to autoplay videos only if connected to WiFi)