Comment 14 for bug 1505014

"Is there a work around for Ubuntu?"

You could add a bug report to the Ubuntu - Something like ' Please package the framework version of the thumbnail plugins'.

or/and

Simply grab the source and compile it - Kubuntu Forums: https://www.kubuntuforums.net/showthread.php?32568-Video-Previews&p=367642&viewfull=1#post367642