[brazen1]

@brazen1 
I would like to create a rule for PotPlayer to insert In the file playercorefactory ,  this , for multimedia content  .mkv that have video resolution to 1920/800 and video resolution 1920/1080 in format  Hevc , obviously independent from the external reader MPC-BE , DSPlayer and VideoPlayer indoor by Kodi , you can help us ?

 You want 1920/800 and 1920/1080 HEVC.mkv files to be played with PotPlayer.

Try adding this to your existing PCF and make sure HEVC is in the file name.
<rule filename=".*HEVC.*" player="PotPlayer"/>

If you already have a rule filename, indent it under the other one.

Put a couple spaces here    <rule filename=".*HEVC.*" player="PotPlayer"/>

like this

<rule filename=".*HDR10.*|.*HDR.*|.*hdr.*" player="MPC-BE"/>
    <rule filename=".*HEVC.*" player="PotPlayer"/>

Can't test it for you so no idea if this will work.  Give it a try and let us know.  I've run into dual rules problems in the past so don't be surprised if it doesn't work.  Always best to post your existing code too.

You could also try
<rule HEVC="true" player="PotPlayer"/>
but I don't know if Kodi will consider HEVC a media format type or not.