Crew or equipment visible
1) The shape of the bishops' mitres are too-narrow and tall for the 15th Century France, and are more proper for 16th century Italy.
2) All coronation ceremonies of the time (which still survive in the Roman service books) specify that the monarch-to-be-crowned is vested in a white alb which covers the coronation outfit. The Dauphin is still dressed in his ermine.
3) The bishop attending continue to wear their mitres during the anointing. The ritual prescribes that the bishop remove his mitre before the anointing.
4) The bishop performing the anointing wears his gloves. The ritual prescribes that the bishop remove his gloves before the anointing.
5) The bishop officiating the coronation holds the ampulla (phial) of oil and shakes it. The correct procedure is for the bishop to remove his gloves, dip the front fleshy part of his right thumb in the Blessed Oil (Oil of the Catechumens), and anoint (rub in the form of a cross) both the palms of the monarch's hands, on the chest, between the shoulders, and on the crown of the head.
6) The coronation ceremony itself has been severely-shortened; in real life, it would have taken up most of the film's running time.
7) The bishop officiating at the coronation has a Rosary in his left hand throughout. A Bishop is not supposed to wear a Rosary during any service.