MatroskaProp

MatroskaProp is a tiny and intuitive app that you can use to view video file properties within Windows Explorer. As the name implies, it supports the MKV format.
This type of program can be of assistance to users who usually work with video processing tools, since knowing MKV file properties is essential to any conversion procedure or any other similar operation.
During the installation procedure you can integrate the app into the shell, show file tooltips, columns and thumbnails.
It is also possible to specify the video frame time and generation timeout for the thumbnails, to enable DShow (Internal Render or IMediaDet), as well as select which properties to show (Matroska information, tags, attachments).
Henceforth, you can hover the mouse cursor over any MKV file within Windows Explorer, in order to find out its properties, such as language, audio stream, file size, average bit rate and length.
MatroskaProp does not interfere with the runtime of active processes, since it requires a very low quantity of CPU and system memory. No error dialogs have been shown in our tests and the app did not cause Explorer to hang or crash; we haven't encountered any issues.
On the downside, MatroskaProp has not been updated for a very long time, but it can be seamlessly handled, regardless of the user's level of experience.