Accidentally deleted videos on iPhone 4?

I've accidentally deleted some videos I had on my iPhone of when my nephew was first born and my trips to the hospital and things. Is there any way that I can retrieve these videos? I stupidly hadn't connected my iPhone to iTunes so I'm not able to do it that way but surely there's something I could do?! Please any ideas would be greatly greatly appreciated!

Did You Back It Up To Cloud Or Something Or Dropbox? Because if you did you can retrieve it then if not your screwed unless you emailed to somebody and can get it from there or some kind of back up.

Unless you have a backup that contains the videos, they're gone.