Let's see what format the CD is first. DVD or VCD? The definition of VCD is definitely not as good as that of DVD, and the definition of DVD is not as good as that of HD. If the cameraman's original material is still there, let him copy and render an HD or DVD. If the shooting is in HD, ask him to render a HD video and burn it into a data disc for you. Hd looks more comfortable than DVD.

First, the serious scratches, bulges and cracks on the surface of the optical disc are physical damages and cannot be repaired. Don't try again.

Second, if the CD is not physically damaged and the CD cannot be read, you can try to use another computer CD to see if you can read the information. If you can copy information, you can. For particularly important information, you can also seek the help of a professional data recovery company.