This is a number put on by the cast of Come From Away -- basically using the regular cast, since there aren't chorus members for the 12-performer musical. It's a very funny take-off of the show's opening number which I posted yesterday, "Welcome to the Rock." The joke here is that the cast is made up of actor/singers who aren't required to be dancers. There is some choreography -- more like coordinated movement -- that's very lively and important to the show, but it's extremely down to earth, although thoroughly effective for that, fitting beautifully into the tone of the show's realism. So, officially it's choreography (and the show even got a Tony nomination for choreography!), but dancers they most definitely are not. Which is the joke here that they acknowledge.
One other note: periodically, the cast shouts out city names. Those are to denote where the production was at the time in its pre-Broadway tour, as the show went through its rehearsals.
If you haven't seen the final opening number that I posted, just scroll back to yesterday (or click this link here) and watch it. It will make the Gypsy of the Year performance all the more pointed and fun.