How can I edit and rotate videos from my iPhone? App?!

I am loading a bunch of my video and photos into iPhoto and well lots of my video is sideways. How can I rotate them? In iPhoto I can rotate pictures but not video

Thanks guys, how would I go about editing them though if they are in my iPhoto library already? Should I hunt down the original files, delete them within iPhoto, then try and re-add them?

I already deleted the backups once they were loaded onto my iMac and in iPhoto

Dave Braine said:

Editing what? The photos or the videos?

Photos in iPhoto, video in iMovie.

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Well I want to rotate videos that are already loaded in iPhoto, I've deleted the originals