Installing Haali Media Splitter gives an option to install a shell extension that lets info from MKV files be displayed in Explorer tooltips and other areas.
Is there a way to get this to work with Opus? I have a lot of MKV video files, and it's frustrating not being able to add any info to their tooltips.
Yup. I think it grabs the text and inserts it into the infotip that Opus generates so you can combine the Explorer infotip with additional information from Opus if you want.