Edge is just one of the video issues. I assumed it was edge from the domain edge-video6*. When you expanded it, it's definitely a Facebook data server domain (fbcdn.net is Facebook's content data repository). You may not be able to access that domain directly. That said, Facebook does the same thing as Edge. They show and pre-load videos (some are ads) as you scroll them whether you want them or not. My wife used to scroll Facebook a lot on her phone until I pointed out how much data it uses behind the scenes - about the same rate as streaming an HD movie. What also doesn't help are all the high-res images that take a tremendous toll on data usage as well.

As to your remark about not changing what you do: Just remember that these platforms (and browsers) are updating what they do and how they do it constantly, many with complete disregard to those of us trying to conserve data usage - they're more driven by improving performance to the general public. Facebook is also notorious for changing your user-settings about not auto-loading video. In fact they change their platforms so fast that Facebook and it's family of apps (Messinger, Instagram, etc.) update just about twice a week now.

Since you stated you don't actually use Facebook, it may still be possible that Chrome has a Facebook plugin that is activating in the background, or some page you go to uses Facebook's CDN for their ads. This brings up another point: Just about anything that shows any kind of video or animation is going to be a black hole for data anymore, mainly because the videos themselves are becoming more and more hi-res. That includes games that show video ads.