Can't figure out why 1/3 data usage on iPhone is for video?

global2 wrote:
choochooman74 may be right. Whenever I have usage complaints, Facebook is the first place I check. FB defaults to autoplay of videos in your news feed. You have to go to settings and disable that. Many vendors not only populate your news feed with unwanted ads, they also love using video.

Plus 2 or should say 3 on this. I had never ad the facebook app on my phone until recently and by data usage went through the roof. It was all facebook. The other program that's just as bad if not worse, Pinterest.