I'm sure you realize that this is a just promotional video with the goal of getting you to start thinking about coming back, and not an accurate representation of the condition of the island as of this minute. My guess is that some of the "customers" in the promo are actually employees or actors. There are no tourists there now, but there are construction people, emergency relief people and an added police and military presence on the island now, so they do have some customers.
I'm a big advocate of people returning sooner rather than later because the economy needs a big boost, but even I wouldn't recommend you going for a vacation there before January, or more prudently until March or April.