For the last week or so, video ads are auto-playing and making pages slow, hang, or crash. The video ads start playing even if I am currently scrolled above or below the ad (i.e., ad is not currently visible on the page). For example, I can open a page (and be at the top) and an ad at the bottom will start playing before I have ever scrolled down. I then have trouble scrolling (hangs) and sometimes the page is stuck even after the video ends and I have to close and reopen. Definitely interfering with the experience. Video ads will also begin to play when I'm not even on the Chalkbucket tab (when I am on another open tab on my browser). I'm on a Mac (Yosemite) using Chrome.