Since Last Update I've Lost the Ability to View MP4 / MKV Files In Viewer Pane

Hi: I'm pretty new with Directory Opus (also not " very tech savvy.") I know I'm not using it to its full potential, but what it can do is outstanding. One of the features I use a lot is the Viewer Pane to review MP4 and MKV files on the fly (best thing ever.) Since the last update, I've lost the ability to view these files. I've tried to follow posts in the forum, but I'm lost. I know I'm missing something. Thanks in advance. Mark

12.33 had no changes to video playback. It's more likely something else on the system changed, probably to do with video codecs.

For Opus 12: HOW TO: Enable/fix playback of various media formats in Opus

For Opus 13: Directory Opus 13 - Highlights - Page 4 [Directory Opus Manual] has a list of recommended codecs for the new video player in 13.