Help with XML

Hello.
I want to configure ip remote control of media player Dune HD.
I need create a RESTFful sensor.
url fo Dune control: http://10.100.0.2/cgi-bin/do?cmd=status
I got this answer:

<command_result>
<param name="protocol_version" value="3"/>
<param name="player_state" value="standby"/>
<param name="pip_zorder" value="400"/>
<param name="video_zorder" value="200"/>
<param name="osd_zorder" value="500"/>
</command_result>

I am only interested third line:
And i only need text standby are something else (play, stop).
How i can get this value for my sensor?