Called 'Baby is Due', the videos feature Sofia Vergara's character Gloria, who is in labour with her first child to husband Jay (Ed O'Neill).
Last season, it was revealed Gloria is pregnant, which she tells Jay at the beginning of the show's fourth season.
Gloria has teenage son Manny (Rico Rodriguez) from her previous marriage.
Modern Family was recently nominated for several Golden Globe Awards, including 'Best Television Series - Comedy Or Musical'.
Modern Family will return this January, airing on Wednesdays at 9pm ET.