Remove incomplete movies from Videos-App iOS 5.1.1

Hello,

I've got a problem with the Videos-App on my iPhone 4s running iOS 5.1.1 (9B206).

A few weeks ago I've added a few small movies to my iPhone via iTunes on Mac. Unfortunately I had to interrupt the transfer-process. Now I have two annoying gray items in my video-library on my iPhone.

Do you have any idea how I can remove them? I've already deleted the videos in my iTunes Library, that's why I can't retransfer them... In addition to that I would like to keep my Phone as it is(use Backup).

Hope you could answer my question!