That file is an alternative, that's why it's not listed. Totem is used for video thumbnailing. What version of Ubuntu do you use? Do you use totem-gstreamer or totem-xine? Nautilus is supposed to try to thumbnail the video only if it didn't change for some seconds so it doesn't keep thumbnailing it. Does it happen with any video? Do you get the same problem if you run gnome-video-thumbnailer from the command line?
** Changed in: totem (Ubuntu) Importance: Undecided => Low Assignee: (unassigned) => Ubuntu Desktop Bugs Status: Unconfirmed => Needs Info -- gnome-video-thumbnailer uses all available CPU power when using bittorrent https://launchpad.net/bugs/79030 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs