Embedded thumbnails in MKV don't display

[conradray]

Hi, I am using latest v2.21, upgraded from v2.0, and using MacOS 15.7.

I downloaded a vp9 video with embedded thumbnail with yt-dlp which gave me an mkv file. I confirmed with VLC player Media Info that the thumbnail was present. I was expecting to see this thumbnail in Finder, but I only see the thumbnail at 2 minutes which is set in QLVideo settings, and not the embedded thumbnail.

Is it possible to see the embedded thumbnail in Finder?

Thanks.