How should I use a five-minute presentation at the beginning of an academic job interview?
Five minutes is pretty long, so I would at least ask your interviewers if they expect you to cover completely new ground.  I don't know if academia is much different to the real world, but in the real world quite often the interviewers haven't done their homework and going back over previous ground is not unusual.  Not only that they may have reviewed so many people that they think you are someone else.  Often they think they have the star candidate in front of them and the worst thing you can do is let them know otherwise