My friend imported some video onto my imac from his camera. He is out of town for awhile and doesnt have the name of the camera, but I believe it is the Insignia NS-DV1080P. I have a 20 inch aluminum imac that I imported the footage to through usb. When I try to play the video in quicktime the video is white and I can hear the audio. Not sure how I can fix this, let me know if that is enough information for some help. thanks