[Wanilton]

@danilozxf, tente com este, não utilizo, mas deve funcionar:

Code:

<playercorefactory>
<players>
   <player name="PotPlayer" type="ExternalPlayer" audio="false" video="true">
     <filename>C:\Program Files\Daum\PotPlayer\PotPlayerMini.exe</filename>
     <args>"{1}" /fullscreen /close</args>
     <hidexbmc>false</hidexbmc>
     <hideconsole>true</hideconsole>
     <warpcursor>none</warpcursor>
   </player>
</players>
<rules action="prepend">
   <rule filenames="mkv" filetypes="mkv" player="PotPlayer"/>
   <rule filetypes="avi" videocodec="xvid|divx|div3|div4|div5" player="PotPlayer"/>
</rules>
</playercorefactory>