playercorefactory

This worked with Kodi Jarvis but doesn’t with Kodi 18 Nightly builds. Any clue why?

Code:
<playercorefactory>
  <players>
    <player name="VLC" type="ExternalPlayer">
     <filename>vlc</filename>
     <args>"{1}"</args>
     <hidexbmc>true</hidexbmc>
     <hideconsole>true</hideconsole>
     <warpcursor>none</warpcursor>
    </player>
  </players>

  <rules action="prepend">
    <rule name="Playtype" filetype="mkv|mp4|avi" player="VLC"/>
  </rules>
</playercorefactory>