I made a mistake.
 

I erased all my videos that i had in library, that was in saved file. How do I get them back? I had them on my desktop too but when i erased them from limewire it erased them too.

You have to be careful deleting files from within LW. They do not go to the recycle bin, they are gone.

Go to this thread for help in getting your files back: accidently deleted songs. You may be able to get some of them back but there are no garantees.