The camera does actually shift slightly to the left, mostly when the wave hits the window. So if it's some sort of static mount it's not a very good one for something like a ship that's constantly going to have some motion.

Also, the vertical video is more of a cell phone thing. I'd expect a mounted camera would more than likely have landscape orientation. That's not to say the video wasn't cropped, but why?

If this is real I'd have to guess something like a phone duct-taped to the wall or something along those lines.