Oh wow! Is the top video the private promenade deck?! I've never seen that video before, do you know what that is lying on the floor at the left when the rov pans round just towards the end?
I image that this is filmed on the ships Port side (if the ship's bow is pointing North then it's on the left hand side) and that the other end must have the door to the B-Deck boarding room and then onto the Grand Staircase at B Deck. Since the Grand Staircase is just a hole, they often use this route to get the mini-Subs into the Titanic's Interior.
There properly used to be were it not for the Bacteria and other organisms on the seafloor that have since eaten any wooden or fabric remains. The Wreck is more of a metal shell now.
Those wreck vids shows wonderful pic, but the site has deteriorated considerably since Cameron's shootings twenty years ago, so I don't think much of it remains today, unfortunately...