Videos not appearing in Camera Roll

Hello, I’m new to the forum and I recently noticed this problem with my iPhone 3G. My friend sent me a couple of videos to me via mms message and I wanted to save them. I press save and when I go into photos, the preview window shows a thumbnail of my videos and the number of pips/videos has increased but the videos are nowhere to be found.

Anyone else having this problem and know of a solution?

Any help would be greatly appreciated!