You know that new autoplay feature on Facebook? The one where you just pause on a video and it automatically starts playing? Kind of cool and maybe a little annoying? It might be costing you big time. Don't watch another video until you find out why.

The research website MoneySavingExpert.com discovered that the new feature is "forcing" people to watch more videos than they normally would. If you're on a restricted data plan with your cell phone company, those extra videos could really be messing with your average consumption of data!

People who have found themselves going over the allotted data amount because of the extra videos are forking over serious cash at the end of the month.