I am new to this forum and an absolute beginner as far as filming is concerned.

I have recently taken several video clips on my Nikkon digital camera. These were intended to be included in a powerpoint display. However, without thinking, I have taken some of them on a portrait format rather than landscape. As long as the audience lies on its side, this would be ok. However realistically is there any way this can be rotated to be shown correctly. Your advice would be most appreciated.