I would be interested to know how a cutscene behavior could possible work?
If a behavior could be written using the SDK for instance, then how do you image it working? What parameters would it accept?
At first,Avoind all the user inputs and all the events outside the cutscene.
At the first second pressed simulate platform pressing left(play animation) and stop this at 5th second.Then wait for 1 sec,Move the other player in the same way.
Make a text pop up,etc etc.