This video is a wee bit populistic and contains some inaccuracies. For example the story that the Mongols threw dead bodies into the city of Caffa was never validated - logic implies that the plague would have spread anyway. That the children's verse at the end describes plague symptoms is a popular belief but incorrect. That seamen wouldn't have noticed rats on the ship is almost funny when a ship without rats would have been a sensation in those days - rats were everywhere and they were on every ship up until modern times.
But apart from this the movie gives an idea what the Black Death had meant.