Can this script work with other content that can be uploaded through coppermine like video clips?
of course it can ;D
I listed a sample of using the $filter function where I only call the jpg files within my video archives in this post:
http://forum.coppermine-gallery.net/index.php/topic,51527.0.html (http://"http://forum.coppermine-gallery.net/index.php/topic,51527.0.html")
Basically in that example all of my thumbs are jpg files and all of my media are zip files or wmv files so it excludes those and only displays the jpg files in that install or can make it specific to cats or albums in the same install (if you have a multimedia setup rather than doing separate installs for photos vs videos)