Don't think so...Suspect they must have blown all their spinnakers / asymmetrics and resorted to flying the only thing left intact!
That’s a heavyweight battened jib (albeit very high clewed, which is unusual with a battened sail), presumably intended to be set on the main forestay. Trying to “make a silk purse of of a sows ear” by flying higher on the masthead spinnaker halyard.
Not sure if legal, but certainly not optimal.
PS Nobody at Apple can be a sailor - IOS spellchecker wrongly undoes correctly spelt nautical words, annoying!
Not really the point...It's not unreasonable to think it would be faster, in very light sloppy conditions, than a code zero or similar. And hoisting it up 4 feet or so can make a significant difference to the wind strength it sits in.