There is no "video" setting in dolphin preferences/general/previews. I have installed ffmepgtumbs and mplayerthumbs.
https://bugs.kde.org/show_bug.cgi?id=351894 /https://www.kubuntuforums.net/showthread.php?32568-Video-Previews&p=367642&viewfull=1#post367642/[1] Regards -------- [1] https://www.kubuntuforums.net/showthread.php?32568-Video-Previews&p=367642&viewfull=1#post367642
