It's really irritating sometimes when you can't view the thumbnails for your Flv files. So now here's this little trick you can play with your registry which will enable you to view thumbnails for all the media files you want.
Okay, so now what you have to do is that you have to make REG files to edit the registry automatically. Here's what you have to do:
Open the notepad and paste the following editing keys for each file type:
For Flv
REGEDIT4
[HKEY_CLASSES_ROOT\.flv\ShellEx\{BB2E617C-0920-11d1-9A0B-00C04FC2D6C1}]
@="{c5a40261-cd64-4ccf-84cb-c394da41d590}"
For DAT
REGEDIT4
[HKEY_CLASSES_ROOT\.dat\ShellEx\{BB2E617C-0920-11d1-9A0B-00C04FC2D6C1}]
@="{c5a40261-cd64-4ccf-84cb-c394da41d590}"
For mp4
REGEDIT4
[HKEY_CLASSES_ROOT\.mp4\ShellEx\{BB2E617C-0920-11d1-9A0B-00C04FC2D6C1}]
@="{c5a40261-cd64-4ccf-84cb-c394da41d590}"
Okay, after pasting any of these in the notepad, save the file with any name with a .reg extension. A registry file will be created. Double click the registry file and you will be asked whether you want to add new information to the registry. Click yes and here you go. Now you can view the thumbnails for your selected file type. :):)
Note: Before playing with the registry, it is always recommended to create a system restore point.
