At the 45:32 mark, you can clearly see Kaidu's sword well away from Kublai's neck. Yet, in camera angles before and after this angle, his sword is clearly against Kublai's neck/beard.
The first scene has a title running across the screen to indicate where it is taking place: Kingdom of Acre, Northern Israel. This is wrong on two accounts: 1) there was never a Kingdom of Acre, Acre was a city in the Crusader Kingdom of Jerusalem; and 2) the country of Israel only came into being in 1948, so 700 or so years after the Mongol Empire.
While the location for part of this episode said to be in: "City of Acre, Northern Israel" the correct location of the City of Acre in this time period is within the Kingdom of Jerusalem.