I find it amusing that the video YT suggest after that one is a CIA chick teaching you how to spot a lie.
I don't think the lower pic shows a submerged boat/sub. It looks more like Google Maps tried to composite two or more images together, or that it was an automated blur effect. It's doubtful that the landing ferry below it is also submerged all the way to its elevated bridge (or whatever that part of that kind of ship is called).