Check that you have the latest version of QuickTime player, from Apple, installed.
Insanity is hereditary, you get it from your children.
What model of camcorder is this video coming from and what resolution is it?
Did you use Premiere Elements to get the video from your camcorder to your computer?
What operating system are you using?
Sorry for the delay in replying. Sent the files back to the videographer - turns out he had converted the files from his Pro camera format to mov and made a mistake in the convertion. Three of us spent a lot of time trying to sort it out and he confessed he made a mistake. Job now edited with correct converted files being used. Elements performed well.
Very good, Brian. Don't forget to mark this question as answered!