Export Video Clips

I shot video on my iPhone, and use my macbook pro as the computer I sync my iPhone with.

I would like to export the video clips once they are imported into my iPhoto library to my iMac since there is much more storage space on the iMac than the macbook pro. Also, the processor speed is much greater on the iMac and so video editing is much smoother. Unfortunately, whenever I export video clips using the export from the file menu, the video clip cannot be viewed once it has been exported as there is nothing to play, but just a thumbnail.

I am assuming I cannot connect the iPhone to the iMac since the iMac is not the computer I use to sync the phone.

Do I just open iMovie and have it "pull" the video clips from iPhoto, and then save the file, and then move it to the iMac.

Any thoughts on how to export the video clips would be appreciated.