/usr/share/kde4/servicetypes/kmediaplayer.desktop is in libkmediaplayer4 4:4.14.2-5+deb8u2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 | [Desktop Entry]
Type=ServiceType
X-KDE-ServiceType=KMediaPlayer/Player
X-KDE-Derived=KParts/ReadOnlyPart
|