Since September, an article on the website MoneySavingExpert warned of its default setting Facebook for automatic video playback could, inflate consumer accounts, as videos use their mobile connection. 
At that time, Facebok said that when updates to their app will not make any changes to the user's settings, so if someone has chosen auto-play, the setting will remain unchanged.
However, with the combination informationiOS and app updates, videos start playing on their own as the device reverts to default settings that allow autoplay. It may sound small, but consider this:
On a phone, where someone average user of Facebook, with regular, daily interactions on the social network, mostly for personal use, his average phone data usage would have jumped from 3GB to 6GB per month by, without changes in usage patterns.
If of course we think of a Facebok user who does not stop controlling his timeline for personal or business reasons, his monthly bills will average an 9GB up.
You can change the settings from the Facebook app on iOS and Android to stop videos from autoplaying. You should check your settings every time there is an update, regardless of what they promise Companies. Of course there are other apps that work automatically, and you must disable their Autoplay ability.
