/usr/share/kde4/services/kffmpegthumbnailer.desktop is in kffmpegthumbnailer 1.1.0-0ubuntu4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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Encoding=UTF-8
Type=Service
Name=Video Files (kffmpegthumbnailer)
X-KDE-ServiceTypes=ThumbCreator
MimeType=video/*;application/x-flash-video;application/vnd.ms-asf;application/vnd.rn-realmedia;
X-KDE-Library=kffmpegthumbnailer
ServiceTypes=ThumbCreator
CacheThumbnail=true
ThumbnailerVersion=1
IgnoreMaximumSize=true
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