I believe now, if you sign up for facial recognition at check in and you enter your passport information, you no longer need to go through customs.
At least, that is how it has been on my last four cruises in Florida.
I could be wrong though.
I saw an article about this video. Someone proved that the cabin shown was not a Carnival ship as the bedding and decor do not match Horizon or any other Carnival ship.
Was just on Paradise on the 07/30 to 08/04 cruise. Got in line at 10:15 a.m. , was sitting waiting to board at 10:30 a.m. and boarding started promptly at 11:00 a.m. Was on board by 11:30 a.m.
Rooms were ready by 1:15, 1:30 p.m. We not allowed to go earlier as S & S cards were not yet out until 1:15 p.m.