I'm not sure what to call Sortie en Mer (A Trip Out to Sea). Is it an advertisement? Well, yes; it was created by the French ad agency CCLM BBDO and funded by the French outdoor clothing maker Guy Cotten. Is it a movie? Well, yes; it's been filmed with actors and a set and so forth. Is it a game? Yes: you can do better or worse at it, through your persistence at a single mechanic, which you'll soon discover.
Perhaps the best way to describe Sortie en Mer is this: It is the most riveting thing I have done on the Internet in ages. Go full screen, plug in some headphones, and try to stay afloat.