Problem with .mov videos

Hi all.
I’ve a raspberry pi b+ and I’ve never been able to see videos .mov (made with iphone) completely.
When the videos are filmed in vertical I see only central part of them; they are cut in the top and in the bottom.
I tried to see in configuration settings but I didn’t find anything to set parameters for .mov videos.
No problems with other extensions.

What can it be?

Thanks to all,
bye, ierevan

Try pressing z a few times during playback to change the zoom level.