Will i lose my pics and vids off my iphone if i restore to ios 6.1.3 from ios 7 beta?

Will i lose my pics and vids off my iphone if i restore to ios 6.1.3 from ios 7 beta?

That depends if you have done a backup of the photos and videos when you was on 6.1.3. Anything you have done after updating will be lost. This is why iOS 7 is supposed to be available for only apple developers and not the general public.