How to remove extra space above the video player
Some WordPress themes will add extra space above the video player in an attempt to make the video responsive (or, mobile-friendly.)
Vimeography already has a feature in place to make your videos responsive, so your theme doesn't need to take this step.
You can tell your theme to ignore Vimeography videos and prevent the extra space from appearing. The best way to do this is to add an html class of "fitvidsignore" to the element containing your video gallery.