>Don't use iTunes for transferring photos or videos. When you plug your iPhone on your pc iTunes will start. Instead of using iTunes go in the file explorer and look in the folders in your iPhone. Find your video and copy it directly from your iPhone to your hard disk. After this is done unplug your iPhone and after that you could remove manually that video from your iPhone.
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>Just another way to make life simpler dealing with iThings ;-)

Yes, this is what I usually do. But, as I mentioned, for one particular video, it just doesn't want to copy it into my PC. I think this is because the file is too big. Yes, it was planned to remove it from the iPhone. But, I cannot do that until I succeed in copying it into my PC.