you won't see the scrollbars on a mobile device but the video is cropped. Rotate your screen in landscape mode and you will see the difference.
I found that this line of code is forcing the video to have a min width of 500px and is causing the scrollbars and the crop
Code:
<div ts="Xp" style="height: 281.25px; width: 100%; min-width: 500px;position: relative; overflow: hidden; -webkit-tap-highlight-color: transparent; background-color: rgb(0, 0, 0); ">
However, there is a good thing in this, i discovered that if a visitor is restricted to see a model, a popup message will appear instead of the embedded cb page. I hope they will fix it soon.