Can't see video on hard drive but can hear audio

I copied to my external hard drive a home movie made on my Mac and outputted to Quicktime from Final Cut Pro. It’s about a 45 minute movie and it was outputted to 1080i 60. I can hear it perfectly but it’s a black screen. I’ve tried a couple of ways exported to different QT formats but no go. One thing that does confuse me is that I was able to see video when I use FTP to transfer a raw video from my Canon 5D MkII. It was extremely choppy. But I could see it. Any enligtenment on the subject would be greatly appreciated. I’d love to have a quick and easy method of viewing my HD family videos.

You may try toggling the Apple H.264 option in the Maintenance --> Settings menu.