I don’t know , why mark zukerburg forcing us to watch the videos on facebook. I think they are planning to launch video marketing on facebook, but I think you don’t want to autoplay the video except you are using your neighbour’s wifi. So here some steps to get rid of this autoplay feature.
First of all visit to Setting page of your account.
Now navigate Video Tab at very last
Here you’ll get the option to disable autoplay videos on facebook.
Thanks to mark zuckerberg. 😛