[EODCrafter]

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>

[ironic_monkey]

i cannot tell you the details of the why, but add video="true" attribute to the player tag.

[EODCrafter]

Just to clarify....
Is that under the player section like this?
<video>true</video>
or some other way? I really don't understand xml script all that well.

[EODCrafter]

Got it after trying it several ways!

<playercorefactory>
<players>
<player name="VLC" type="ExternalPlayer" video="true">
<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>

Thank you @ironic_monkey !

[ironic_monkey]

for future reference;

Code:

<tag attribute="something">value</tag>

is common xml terminology.