This is the same ferry I used to cross over to Lewis on, MV Suiliven, now only just retired, and sadly awaiting a buyer to take her to the breakers... the video does show the props emerging from the water... this was filmed leaving (Wellington?) a harbour between the north and south Islands of New Zealand...
I had my worst trip was on her predecessor, going over to the Island, 2nd January 1974... it was a storm force ten in the Minch and it normally (for the MV Hebrides) took 3hrs 30min to make the crossing to Stornoway... I was heading up for my gran's funeral (she died new-years morning) with mum. dad and sis and we were stuck in port with a funeral scheduled for 1000 the next morning... dad drove all night to get there for the ferry and it was too rough to sail... mum spotted someone she knew in the ships crew and she was able to find us a freebie berth for the four of us for the night... in the early hours the storm had abated to Force 9 and the Captain, knowing he had a tough ship, set sail... the trip took 5hrs 15mins, canted the whole way by at least ten degrees to port, into the teeth of the storm, bow fully disappearing into waves numerous times and the sound of the props coming out of the water is something you just do not want to hear, but it certainly happened, far too frequently... all you could see out of the windows was blackened seas to port and iron-grey skies to starboard... it was impossible to open the starboard doors and it was plain nuts to goo out to port, but some did, myself included... closest I've ever been to being travel sick... probably should not have had the full Scottish brekkie I had...
We made the funeral, just...