Thumbnails Lost?

Hi,

I was copying some photo and video files to a cd. After copying and checked
it and one of the videos would not play. On both the Cd and the original file
does not show thumbnail pix. It shows and fold with the date. When you check
the properties, it has
size: 102 KB; 112KB on disk; contains 4 files and 0 folders.
Inside folder there are: 5 icons ( Media player, 3 MVI. THM , and Thumbs.db
icons).
Media player icon properties: properties does not exist
MVI_1791.THM: size: 9.58 KB
MVI_1792.THM: 10 KB
MVI_1793.THM: 9.48 KB
Thumbs.db: 73 KB

video clip 316mb

Yet the video when played is blank.

Might I have lost the data some how during the copy?

Hope someone can help. Thank you Karen G