That’s not a simple answer, there are many things I can do from open iron door when someone comes in with a fendente. Each will have a different answer to your question.
A few options with a longsword:
I can counter cut up to womans guard on the left and knock his attack out of the way in the process. –- http://www.youtube.com/watch?v=V6A5rgx-r9w
similar to @ :28 and again :30 depending on the angle of intersection you may call it edge to edge or flat to flat or oblique...
raise my blade to ‘two horns’ to thrust at him – his blade lands on between my quillion and fort.
fendente into his fendente - same as #1
rotate up to crown guard or window guard – too many possibility that leave many options, but closer to the video you posted.
I can go on and on, but all of these actions are before I add in footwork and discuss what target I am aiming for. What part of my blade comes in contact depends on what action I want to do and that has many different options. I can think of no ‘this is the only way to do it.’
Sabre – depending on the attack:
I can do an ‘Italian inside moulinetto’ or rotate to inside hanging guard to receive the attack then make cut 7
I can receive the attack in inside guard (angle dependent,) throw it off and make cut 4 at the head
Doh, ran out of time, others can continue…