It is blessing since this kind of auto playing does not make any sound since Facebook let the videos is played in silent until the viewer turn on the sound button. Look at the following article to disable Auto-play Facebook Videos on iPhone 6S.
How to Turn Off Auto-play Facebook Videos on iPhone 6S
You can make it done in seconds.
- Firstly run the Facebook app on your iPhone 6S at normal. You then touch on More menu, then scroll the screen down to tab the Settings.
- Access Account Settings
- Select Videos and Photos, touch on Autoplay option, then make sure Smart Autoplay option is turned to OFF.
- You now are able to choose one the 3 options: Use Cellular Data and Wi-Fi, Use Wi-Fi Only, and Never Play Videos Automatically.