Adjust position of Zerif Pro Video Background Thumbnail Image

Hello, Since the mobile version of my website can’t load the background video that Zerif Pro offers, it displays the video thumbnail image that I have selected. The problem is that when you look at the site on the phone, the thumbnail image selected is cut in half and not centered while holding the phone vertical. I noticed that it’s centered when it’s turned to the side, but I want it centered in all views.