It’s actually really easy to do:
On a computer – While on Facebook, simply go to the drop-down menu in the top right corner. Click on “Settings”. On the left, you’ll see an option for “Videos”. You’ll either find that it is set to “On” or as it was in my case, it might be set to “Default”. All you need to do is set it to off and from now on, when videos come through your newsfeed, they won’t auto play anymore! WOOOHOOOO!
On your iPhone or iPad – Go to “Settings”. Scroll down and find Facebook. Click on that. Now near the top of the list, you’ll see “Settings”. Click that. Next you’ll see “AutoPlay”. Click that and then you’ll have the options for: On, Wi-fi only, and Off.
Note: if you choose to leave it On or set to Wi-fi only, the videos will only use data for the length of time that you actually are viewing the video. So, if you scroll past it, it will only be for a second or two but if you linger there with the video on screen, it will use more.
On Android – FYI: I have not personally tried these instructions because I don’t own an Android device. I found these online and am including them here for your convenience. Begin by opening the Facebook app on your device. Now, click your phone/tablet’s menu button. Click settings, Scroll down and click “Video Auto-play”. Choose the option you prefer.
Now you don’t have to endure auto playing videos on Facebook anymore. You’re welcome.