The video pop up was working properly previously on mobile with the video centered and scaled down in size. Now, the video is large as if for viewing sideways only in mobile. It is off to the side so users can’t close the window unless they turn their phone sideways.
I have the same issue, not only on mobile, but on any screen that is smaller than the originally set width of the popup.
It looks like the fist time the popup is loaded, the left coordinate is somehow miscalcultated, so it goes beyond the left edge of the screen – sometimes a little bit, sometimes completely. If I resize the window or close the pop up and open it again (it is triggered by click on a link), it all work prefectly fine.
It also looks like the problem exists only if I select “Width only” as the Responsive Mode. With “Full resize” selected the issue no longer exists.