Dead Disk Doctor allows you to copy files from scratched or damaged CD, DVD disks, unreadable Floppy and Hard Drives or other media. It replaces lost data with random bytes reading files by expandable blocks.
Clean the disk with cotton wool fabrics, insert disk in to DVD drive, run Dead Disk Doctor application. In appeared window choose "I want to copy files from damaged media to a specific folder" line, double clicking on it , or click "Next >" button .

Recovery process separated on few steps.
Step 1. Choose source drive on left part of the window clicking on it's icon.
Step 2. Selecting distention drive and folder, to proceed copying selected files.

Routine reads file by 4-16kb blocks and when hardware involves errors, the size of block decrease two times and so on until the moment when block of data will be read without any errors, or it reach minimum read size block, depending on file system, then program fills one block with random data and starts to read second one. After successfully reading data, block size increase two times again and again to reach maximum size.

Dead Disk Doctor - works excellent with Video or Audio files.

The license of this software is Free Trial Software, the price is $5.95, you can free download and get a free trial.