Can you change a thumbnail e.g. for a video clip?

[TobyR]

I've uploaded a WMV file to Coppermine and would like to change its thumbnail so instead of a WMV icon it is a still picture.  Is it possible to change an image/video's thumbnail in this way?

thanks in advance
Toby

[Sami]

http://coppermine-gallery.net/demo/cpg14x/docs/index.htm#cust_thmb