How to justify the header video in bold photography pro

I am hoping you can assist me. How can I justify the header video to centre? I had loaded a video for header media and it was showing the centre of the video on mobile phones, which was just about okay. However, it has now taken to showing the far left of the video, which misses the building altogether and makes a nonsense of my opening video. Is there a fix to get the central section to show once more? see geraldmclean.com