They are repeating one "combo" all the time and their swords look like if they were cut from a sheet of tin.
For most of the scene, they're showing the attack, the parry of the attack, the parry of the parry Etc...
And most of these move work if you've trained them, and when I say trained, it's again and again and again until they've besome reflex.
I posted about one group that does Kunst des Fechtens on old taleworlds forums somewhere. I have some friends doing it and by coincidence it is too a Slovak group. As far as i know there are some groups in Germany, Poland and Hungary too which do this fencing. I might dig the link up if you want to see it 
And in France, in England, in Spain, etc... There not so many manuscrit speaking about medieval fight who've survive the passage of time.
