View .mkv in quicklook Is there any plugin (or other way), to add support for mkv files in quicklook? In my searches, the way I found of doing it involves installing perian, which I’d really prefer not to do for a number of reasons, one of them being that it’s no longer in development.
A quick search turned up QLVideo, which I've now installed. It provides limited functionality with mkv (as well as avi, flv, asf, and a few others) including preview screen shots in QuickLook and thumbnails in Finder's GetInfo window. Unfortunately it does not actually play the video.

https://github.com/Marginal/QLVideo/releases/tag/rel-172

Sadly, Perian (a brilliant piece of software that I miss dearly) does not work with Apple's new replacement for the QuickTime infrastructure in MacOS.