I literally just came here to ask the same thing! Start on the news page, video pop up. Click a post, video pop up. Go back to the news forum, video pop up. Click a different post, video pop up. I really hope there's a way to get rid of these permanently! I've tried letting the video run, I've tried Xing it out, they keep coming back!!
Hadn't seen them Sunday or this morning on my iPad, but those video ads are back this morning on Chrome desktop - sliding in on the lower right of the screen