I lost my amv

I edit amv quite requarly and one of my prised one got corrupted. I am freaking out! On my main rig the original video files show grey slashes through them and also have completely different video files from other vids in the project!

i dont know what to do and i have spent so much time on this and its gone i have the original on my laptop but i dont have any exports left to put it on my pc. I don't know what do to