NYC Bicycle Drag Race???

I happened across a movie of a bicycle drag race in NYC, looks like sometime in the winter. They seem to be posing as bike messengers (day job?) and they race from Central Park, through the busy day time streets, to some finishing place.. I’m having problems getting the whole video, but it’s fascinating to watch. Now I’ll always be wondering, are those insaneo bikers delivering packages, or in a race?