It’s the most annoying thing … you scroll through your feed or timeline, and one of the feeds has a video. It plays as soon as you scroll to it. While it is a neat feature, not everyone wants it on by default. First, it’s annoying, if you are scrolling through it, wasting time, in a doctor’s office. If you have your phone on half volume, then everyone will hear the video. Second, it chews up your bandwidth.
So when you read articles from Facebook, it tells you about the obvious disadvantage of it using up bandwidth on your phone. So why the hell do you have it enabled by default? You would expect that it would be off by default, and you would opt in, if you happen to be in high bandwidth wi-fi regions. Not only that, they make it extremely difficult to find the options to disable it. I guess I should be fortunate that they give you an option to turn it off … but there is no reason why it should be enabled by default, on your mobile phone!