At first I thought it was a big due to auto-play but I’ve been able to recreate the bug without out. Refreshing the page doesn’t always fix the problem, but does about 70% of the time. I’m using Firefox and Windows 8, I’ve also tested on Google Chrome and IE (yuk, who uses that!).
Here’s a screenshot to assist in your efforts.
Hope it help!
When I refresh the page on an iPad, the box displays in full size. Annoying, but it works.
It seems to be good at times, then back to bad. I wonder if it’s related to css - it definitely happens more when autoplay video is in link