Why can't Plex play an MKV

[nibbles]

@nickest1981 your goal would be to determine which ones play and why. Start a new thread for yourself and document it there. You will get some general troubleshooting tips from the thread:

How to get Help in the Forums

Community members who are trying to help, generally gravitate and hang out in the forum sections in which they are most knowledgeable. The best way to get the appropriate help is to find the most closely related section for the issue you are having. For instance, if you’re having trouble installing Plex Media Server on a Windows computer, then the “Windows” forum in the Plex Media Server area would be the most appropriate place to post. If you don’t know the most appropriate forum for your issu…