If you need to watch the video on a device that doesn't support MKV (like some older smart TVs), you can use HandBrake to convert it to a more universal MP4 format.
The most recommended "all-in-one" solution that handles almost any MKV file without extra codecs. 2021 09 19 11 08 29 mkv
Because MKV is a complex container, some default players (like older versions of Windows Media Player) may struggle with it. If you need to watch the video on