Lindybeige humorously points out a few of the endless stream of historical errors that are the norm in programs set in the middle ages.
Historical inaccuracy is so normal that if a film or TV company did portray things realistically it would look unusual and most people would probably assume it was all wrong. Hey, everyone knows that everyone in the middle ages was dirty, studded soft leather "armour" was all the rage and everywhere was lit by flaming torches all the time.