If it's write protected for some reason, you should still be able to read it and copy the video off before you throw it away. Otherwise, you surely have a backup of such an important video.
If none of the two, find a data recovery company to get to get that file for you.
Kees
Hi,
I have 8GB Kingston pen drive, due to some problem it showing write protection error message when I plug in to computer or laptop. Please guide me how can I handle the problem, I want to my marriage video from it. It is very important for me please help me as soon as possible.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic