The Thumbnail Click Action can be set to Open Default Application. I have set to use this action because the internal player for for video files is too choppy. However, for images, I like to be able to use the Preview. I tried setting it to Preview, then use the Open with context menu on video files and tell it to always use VLC, but that doesn't work as the next click will still open Preview.
Leave the default internal view setting enabled. A click with the Alt key then starts the standard application. So you can choose for each file whether internal or external with standard application. Maik
(In reply to Maik Qualmann from comment #1) > Leave the default internal view setting enabled. A click with the Alt key > then starts the standard application. So you can choose for each file > whether internal or external with standard application. > > Maik Got it, that's a workaround for now. One has to Alt click each time (even for the same file), so the application does not have any means to remember the preference right now.