Nautilus creates thumbnails of >100MB videos although max size in settings is 10MB

Nautilus creates thumbnails of >100MB videos although max size in settings is 10MB.

Does this maximum size setting only apply to images, or is this the maximum amount of data to be read from a file until a thumbnail can be created (for videos, probably only the first frame is needed)? I would expect it to apply for all file types.

In my case these were .mp4 videos on a SMB share.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: nautilus 1:3.4.2-0ubuntu8
ProcVersionSignature: Ubuntu 3.5.0-34.55~precise1-generic 3.5.7.13
Uname: Linux 3.5.0-34-generic i686
ApportVersion: 2.0.1-0ubuntu17.3
Architecture: i386
Date: Fri Jul 5 15:55:35 2013
GsettingsChanges:
 org.gnome.nautilus.window-state geometry '844x683+754+24'
 org.gnome.nautilus.window-state sidebar-width 191
 org.gnome.nautilus.window-state start-with-status-bar true
InstallationMedia: Ubuntu 12.04.2 LTS "Precise Pangolin" - Release i386 (20130214)
MarkForUpload: True
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
SourcePackage: nautilus
UpgradeStatus: No upgrade log present (probably fresh install)